ID: nht92-2.38

DATE: 11/10/92

FROM: BARRY FELRICE -- ASSOCIATE ADMINISTRATOR FOR RULEMAKING, NHTSA

TO: DENNIS T. JOHNSTON -- ENGINEERING PLANNING AND LIAISON MANAGER, ROVER GROUP NORTH AMERICAN ENGINEERING OFFICE

ATTACHMT: ATTACHED TO LETTER DATED 8-12-92 FROM DENNIS T. JOHNSTON TO NHTSA ADMINISTRATOR

TEXT: This responds to your document dated August 12, 1992, which was characterized as either a petition for reconsideration or a request for interpretation, depending on our response. The document concerned a final rule published in the Federal Register (57 FR 30917) on July 13, 1992, which responded to petitions for reconsideration concerning the extension of Standard No. 214's quasi-static side door strength requirements to light trucks, buses, and multipurpose passenger vehicles (collectively referred to as LTV's). As discussed below, we are treating your document as a comment on a related January 1992 notice of proposed rulemaking (NPRM), and not a petition, because your concerns relate to a possible future final rule based on that NPRM.

By way of background information, NHTSA extended Standard No. 214's quasi-static side door strength requirements to LTV's in a final rule published on June 14, 1991. In the preamble to the final rule, the agency stated that it intended to propose amendments to the standard in the near future to clarify the test procedure for two types of doors, double-opening doors and doors without windows. NHTSA's NPRM was subsequently published in the Federal Register (57 FR 1716) on January 15, 1992.

As discussed in the January 1992 NPRM, the agency determined that clarification of the test procedure was needed for certain contoured doors, as well as for double-opening doors and doors without windows. Standard No. 214's test procedure works well when a door's lower edge is essentially horizontal along its entire length, or only a small portion of the door's lower edge deviates from that description by being contoured upward. Almost all passenger cars have doors of these types. However, as discussed in the January 1992 NPRM, the standard's test procedure is not appropriate when only a small portion of a door's lower edge is horizontal and the edge is contoured significantly upwards for a large part of the door. Some LTV's have such doors.

The NPRM therefore proposed amendments to clarify the test procedure for contoured doors.

The comments closing date for the January 1992 NPRM was March 16, 1992. The agency has not yet reached a decision concerning a possible final rule. On July 13, 1992, however, NHTSA published its response to a petition for reconsideration of the initial final rule extending Standard No. 214's side door strength requirements to LTV's. The petition requested that the agency phase-in the new requirements instead of applying them to all of the newly covered vehicles simultaneously. As part of its response to that petition, NHTSA delayed by one year the effective date for double opening cargo doors, doors with no windows, and certain contoured doors on those vehicles.

In your August 12, 1992 letter, you noted that the July 1992 final rule delayed the effective date of the side door strength requirements for doors for which the ratio of the width of the lowest portion of the door to the width of the door at its widest point is not greater than 0.5. You expressed concern that, in a possible final rule based on the January 1992 NPRM, the agency might use a discriminator other than the 0.5 ratio for determining which contoured doors must conform to particular tests. You stated that this could have significant cost impacts on your company.

While you characterize your document as a possible petition for reconsideration of the July 1992 final rule, the only concerns you raise relate to a possible final rule based on the January 1992 NPRM. Therefore, we do not consider your document to be a petition for reconsideration.

I note that the use of the 0.5 ratio in the July 1992 final rule was not intended as a signal concerning the final action the agency may take on the January 1992 NPRM. As indicated above, the current Standard No. 214 test procedure only creates problems for contoured doors which have a significant degree of contour. In order to delay the effective date for those doors and not ones that have only a small degree of contour, it was necessary to specify a definition. The agency selected the 0.5 ratio to ensure that the effective date was delayed for contoured doors which have a significant degree of contour.

We will consider your August 1992 submission as a comment on the January 1992 NPRM. A copy of this correspondence is being placed in the public docket.

ID: nht92-2.39

DATE: November 10, 1992

FROM: Duane Bartels -- Commercial Vehicle Inspector III, MN State Patrol

TO: Chief Counsel -- NHTSA

TITLE: None

ATTACHMT: Attached to letter dated 5-21-93 from John Womack to Duane Bartels (A41; Part 566; Part 567)

TEXT: A person in the State of Minnesota has requested to change the seating in a 12 or 15 passenger van to a maximum of 10 passenger. This would change the original manufacturers rating of a "Bus" because the vehicle carries more than 10 to a vehicle classification of "MPV" which is designed to carry 10 or less persons.

His proposal to do this type of work is to remove and or modify seats so the van can only carry a maximum of 10 people. When seats are removed all fastening devices and holes in the floor will be removed or covered as not to allow a seat to be readily put back in the vehicle. When a seat is modified he either modifies the seat frame or does upholstery work to reduce the number of people that can sit in the seat. (ie: a 3 passenger seat to a 2 passenger seat or a 4 passenger seat to a 3 passenger seat). Extra seat belts are removed to comply with the new seating. There is no other work done to the structure of the vehicle.

This person will then affix an additional label of the type and in the manner as prescribed in 49 CFR 567.4.

By doing the above work to a vehicle, this person believes he is allowed to do such work and recertify the vehicle according to 49 CFR 567.7. 49 CFR 567.7 are requirements for persons who alter a certified vehicle by other than addition, substitution or removal of readily attachable components.

Before he is given permission to do this type of work, some questions need to be answered.

1. By doing this altering to seats, is he doing enough work to the vehicle to qualify under 49 CFR 567.7?

2. Will this person become a manufacturer and if so, does he need to comply with 49 CFR 566.5?

3. Can he purchase a new vehicle, do the altering and resell the vehicle or must an owner bring the vehicle to him and have the altering done?

4. Can this altering and recertifying be done only to a new vehicle or can this be done to a used vehicle?

Please review 49 CFR 567.7 and return back to me your opinion on the questions I have listed.

Thank you in advance for your help in this matter.

ID: nht92-2.4

DATE: 11/25/92

FROM: PAUL JACKSON RICE -- CHIEF COUNSEL, NHTSA

TO: KEVIN MITCHELL -- GOODYEAR TIRE & RUBBER CO.

ATTACHMT: ATTACHED TO LETTER DATED 9-21-92 FROM KEVIN MITCHELL TO PAUL J. RICE (OCC 7759)

TEXT: This responds to your letter asking about the hydraulic brake hose labeling requirements (S5.2) of FMVSS 106, Brake Hoses. You indicated that your current brake hoses have two stripes, on opposite sides of the hose. Each of the stripes is interrupted by a line of information. One line, which you call the "DOT print line," contains the information required by FMVSS 106. The other line, which you call the "SAE print line," contains certain information not required by FMVSS 106, including "batch and shift" information.

You asked whether it is permissible to place the batch and shift information (consisting of a mark such as "AA") on the DOT print line. You stated that moving the batch and shift mark to the DOT print line would improve the legibility of the SAE print line. This is because better print materials could be used in the SAE print line if that legend did not contain a mark that must be updated on a daily or more frequent basis, such as the batch and shift mark. As discussed below, the batch and shift information may not be placed on the same line as the required information.

NHTSA's longstanding position, stated in past rulemaking notice preambles (e.g., 39 FR 7425, February 26, 1974; 39 FR 24012, June 28, 1974), is that the DOT print line may only contain the required information. The striping requirement (S5.2.1) of FMVSS 106 states that one of the requisite stripes on a brake hose "may be interrupted by the information required by S5.2.2, and the other stripe may be interrupted by additional information at the manufacturer's option." We interpret this to mean that the stripe that is interrupted by the required information may not be interrupted by information voluntarily provided by the manufacturer. This conclusion is consistent with the preamble for the final rule establishing S5.2.1 (38 FR 31302, November 13, 1973), which refers to optional additional information as not being permitted in the legend that interrupts the first stripe. (That rule modified the labeling requirements to permit interruption of the second stripe with the optional information.) NHTSA did not permit optional information to be mixed with the required information because the mixture of optional and required labeling could obscure or confuse the meaning of the required information, or interfere with the appearance of complete labeling on some hose assemblies.

For your information, we have enclosed the Federal Register documents cited above. Please contact Ms. Fujita of my staff at (202) 366-2992 if you have any further questions.

ID: nht92-2.40

DATE: 11/09/92

FROM: PAUL JACKSON RICE -- CHIEF COUNSEL, NHTSA

TO: CHRISTOPHER LEONE -- NEWBOLD DESIGNS

ATTACHMT: ATTACHED TO LETTER DATED 8-6-92 FROM CHRISTOPHER LEONE TO TAYLOR VINSON

TEXT: This responds to your FAX of August 6, 1992, to Taylor Vinson of this Office, asking for rules and regulations of the Department on electric vehicles. I understand that you talked with Mr. Vinson later in the day, and received an overview of the matter. I further understand that you intend only the construction of a single experimental vehicle, and have no plans for its production.

Under the National Traffic and Motor Vehicle Safety Act, the introduction into interstate commerce, by any person, of a motor vehicle that does not conform to all applicable Federal motor vehicle safety standards is a violation, for which a civil penalty of up to $ 1,00 may be imposed. The Federal motor vehicle safety standards are set out in Title 49 Code of Federal Regulations Part 571. There are no standards that apply to your project car are those that apply to "passenger cars" in general.

However, the manufacturer of an electric vehicle may petition us for a temporary exemption (up to 2 years) from one or more of the safety standards on the basis that the exemption would facilitate the development and field evaluation of a low-emission motor vehicle. The temporary exemption regulations are found at 49 CFR Part 555. An exemption covers up to 2,500 vehicles per year for any 12-month period that the exemption is in effect.

Regulations governing the licensing of motor vehicles are the prerogative of the individual States. Thus, you should inquire as to what Rhode Island requires for your contemplated vehicle.

There is a regulatory gap which your situation highlights, and that is the legal status of a person who intends to build only a single motor vehicle. Such a person is not a "manufacturer" under the Act, since the operative portion of the definition of "manufacturer" is one who manufactures or assembles "motor vehicles". The temporary exemption authority appears directed towards commercial enterprises and not single motor vehicles. Nevertheless, we believe we have the authority to exempt a single motor vehicle under these provisions.

If you wish to consult us further in this matter, Taylor Vinson will be pleased to help you.

ID: nht92-2.41

DATE: 11/09/92

FROM: MARION C. BLAKEY ADMINISTRATOR, NHTSA

TO: HONORABLE JOHN D. DINGELL -- CHAIRMAN, COMMITTEE ON ENERGY AND COMMERCE, U.S. HOUSE OF REPRESENTATIVES

COPYEE: MR. AARON GORDON

ATTACHMT: ATTACHED TO LETTER DATED 9-17-92 FROM JOHN D. DINGELL TO MARION C. BLAKEY

TEXT: Thank you for your letter of September 17, 1992, enclosing correspondence from Mr. Aaron Gordon concerning seat belts on school buses. You requested comments on Mr. Gordon's letter and on H.R. 896, a bill referred to in Mr. Gordon's letter.

The issue of safety belts on school buses is an important topic which the National Highway Traffic Safety Administration (NHTSA) has thoroughly studied for many years. School bus transportation has been and continues to be one of the safest forms of transportation in America. Every year, approximately 370,000 public school buses travel approximately 3.5 billion miles to transport 22 million children to and from school and school-related activities. Since NHTSA began tracking traffic fatalities in 1975, an average of 16 school bus occupants per year have sustained fatal injuries. While each of these fatalities is tragic, the number of school bus occupant fatalitie is small compared to the number of occupant fatalities to children in other types of vehicles. For example, in 1989 there were 5,287 deaths among children aged five to 18 in vehicles other than school buses.

In 1977, NHTSA issued Federal motor vehicle safety standard No. 222, School Bus Passenger Seating and Crash Protection, which established minimum crash protection levels for occupants of all school buses. For large school buses, those with a gross vehicle weight rating (GVWR) above 10,000 pounds, the standard requires occupant protection through a concept called "compartmentalization" -- strong, well-padded, well-anchored, high-backed, evenly spaced seats. The effectiveness of "compartmentalization" has been confirmed by independent studies by the National Transportation Safety Board (NTSB) and the National Academy of Sciences (NAS). Under the current requirements of Standard No. 222, small school buses, those with a GVWR of 10,000 pounds or less, must provide "compartmentalization" and be equipped with lap or lap/shoulder belts at all designated passenger seating positions. The agency believes that safety belts are necessary in addition to "compartmentalization" in small school buses because of their smaller size and weight, which are closer to that of passenger cars and light trucks.

In 1987, the NTSB completed a study of the crashworthiness of large school buses, and concluded that most school bus occupant fatalities and serious injuries were "attributable to the occupants' seating position being in direct line with the crash forces. It is unlikely that the availability of any type of restraint would have improved their injury outcome."

In 1989, NAS completed a study of means to improve school bus safety and concluded that "the overall potential benefits of requiring seat belts on large school buses are insufficient to justify a Federal requirement for mandatory installation. The funds used to purchase and maintain seat belts might better be spent on other school bus safety programs and devices that could save more lives and reduce more injuries." The NAS pointed out that since children are at greater risk of being killed in school bus loading zones (i.e., boarding and leaving the bus) than on board school buses, "a larger share of the school bus safety effort should be directed to improving the safety of bus loading zones." A summary of the NAS report is enclosed.

In response to the recommendations from the NAS study, NHTSA has initiated several rulemaking actions, such as improvements to school bus visibility by the driver and requiring stop signal arms on school buses, designed to improve the safety of students in school bus loading zones. Besides the actions taken in response to the NAS study, NHTSA has initiated several other rulemaking activities to improve further the safety of school buses, e.g., increasing the number of emergency exits, establishing wheelchair securement/occupant restraint requirements, and improving the body joint strength requirements.

While there are no Federal requirements for safety belts on large school buses, states are free to install them if they feel it is in the best interest in their state. However, as noted in the NAS report, if the safety belts are to be beneficial, "states and local school districts that require seat belts on school buses must ensure not only that all school bus passengers wear the belts, but that they wear them correctly."

In summary, the safety record of school buses is outstanding. As such, there is no compelling evidence to suggest that safety belts would provide even higher levels of occupant crash protection. Also, the agency agrees with the conclusion from the NAS report, that there is insufficient reason for a Federal mandate for safety belts on large school buses.

I hope you find this information helpful.

ATTACHMENT TRB REPORT SUMMARY, DATED MAY, 1989, ENTITLED SPECIAL REPORT 222-IMPROVING SCHOOL BUS SAFETY. (TEST OMITED)

ID: nht92-2.42

DATE: November 9, 1992

FROM: Rodney T. Nash -- Vice President Engineering, Collins Industries, Inc.

TO: Administrator, NHTSA

TITLE: None

ATTACHMT: Attached to letter dated 12/30/92 from Stephen P. Wood (signed by John Womack) (A40; Part 571.3)

TEXT:

Please forward this letter to the appropriate locations within the office of General Counsel to answer this question on vehicle designation. The final-stage manufacturer of a vehicle is required to label his vehicle with the information designated in FMVSS 115 and FMVSS 120. This information requires the final-stage manufacturer to designate the vehicle classification involved. We need to know how to classify an ambulance that is built on a truck chassis.

The ambulance carries more weight of specialized equipment for patient-care support than it carries people. The special purpose vehicles operates half of its life with no patient in the rear cargo area but always carries heart monitors, jaws of life, stretchers, respirators, and other life-support equipment. The question that needs clarification is what vehicle class (truck or MPV) should be applied to an ambulance. Should the classification change if the vehicle is focused on equipment transport over patient transport? It appears to us that the final-stage manufacturer is free to select between these categories.

Should you wish to discuss this question further, please call 316-663-5551 during normal working hours. I've taken the liberty of enclosing a piece of sales literature for a cargo intensive ambulance for you to review in issuing your opinion letter.

Thank you in advance for any prompt consideration you can give this request.

ID: nht92-2.43

DATE: 11/07/92

FROM: JORDAN J. POKRINCHAK -- PRESIDENT, JORDAN RESEARCH CORPORATION

TO: PAUL JACKSON RICE -- CHIEF COUNCIL D.O.T.

ATTACHMT: ATTACHED TO LETTER DATED 12-4-92 FROM STEPHEN P. WOOD TO JORDON J. POKRINCHAK (A40; STD. 108); ALSO ATTACHED TO NHTSA LETTER OF 3-26-92 TO CHARLES W. O'CONNOR

TEXT: I am writing to you in regard to your recent decision to approve electronic brake controls made by Tekonsha Engineering Company in relation to stop lamp operation when braking with a trailer in tow.

I would cite Section 393.25 Paragraph (F) "Stop Lamp Operation," of Code of Federal Regulations Volume 49 (Transportation Parts 400 to 999) Revised as of October 1, 1989, for the basis of my concern as to the operation of the stop lamps when applying the trailer brakes in an emergency condition.

I believe this section of the code is quite specific when dealing with the actuation of the trailer stop lamps, either manually or automatically, and has nothing to do with the installation of controllers in regard to rendering the stop lamps inoperative in whole or in part within the meaning of Section 1397 (a) (2) (A) of 15 U.S.C. which you have cited in rendering your decision.

I also believe that in all laws and regulations, there is the letter of the law, and the intent of the law which must be considered when rendering such an important decision as you have on Tekonsha Brake Controls and its effect on the general driving public.

Tekonsha Engineering has had problems with the operation of their brake controls for some time. One way of alleviating the problem was to remove the wire that activated the control through the tow vehicle stop-light switch and which in turn operated the stop lamps on the trailer being towed. By eliminating this feature of activating the trailer stop lamps in the manual mode, they have placed the operator of the vehicle towing the trailer at risk for a rear end collision. While he (the operator) may have knowingly rendered the stop lamps on the towed vehicle inoperative for the duration of such activation of the hand control (manual mode) as stated in your decision, the driver behind the trailer has not been given any warning that the brakes on the trailer are being applied.

Tekonsha Engineering has cited your decision in regard to Section 1397 (a) (2) (A) with all due pomp and circumstance, but has failed to comply with common sense in regard to avoiding accidents. You have in effect given them the "green light" to produce their "Voyager" and "Commander" brake controls without regard to driver safety.

I believe you should reconsider all the facts in rendering your decision on the basis of driver safety and not some regulation that Tekonsha Engineering is using out of context. We do, Gentlemen, look to you for decisions that will protect lives on our highways.

You have it within your power to require Tekonsha Engineering to comply with regulations pertaining to the operation of trailer stop lamps by simply requiring that they (Tekonsha Engineering) add the wire or connection to their controls that would activate the trailer stop lamps in the manual mode. After all, they are the only manufacturer of trailer brake controls that do not activate the trailer stop lamps in the manual mode and are using you to help market a potentially dangerous product.

ID: nht92-2.44

DATE: 11/06/92

FROM: RICHARD HORIAN -- PRESIDENT, WOODLEAF CORP.

TO: PAUL J. RICE -- CHIEF COUNSEL, NHTSA

TITLE: SUDDEN BRAKE INDICATOR HAZARD LIGHT

ATTACHMT: ATTACHED TO LETTER DATED 12-7-92 FROM PAUL J. RICE TO RICHARD HORIAN (A40; STD. 108)

TEXT: Enclosed is an official request for proposal to allow a vehicular lighting system that warns when an emergency braking situation or other hazard is occurring. Simply, when a driver engages in hard braking, a circuit activates a separate lighting system to warn other drivers to pay special attention to a potentially hazardous situation.

The Sudden Brake Indicator Hazard Light is different from other similar systems proposed over the years with the following unique advantages:

(A) An electronic pressure switch is used within the brake pedal assembly. No hydraulic pressure switch is mounted within the vehicle's hydraulic brake lines. If the electric pressure switch fails for any reason, all existing braking and lighting systems on the vehicle remain unaffected.

(B) Increased foot pressure being applied during hazard braking conditions is a natural ergonomic reflex. The driver does not have to divert his attention to activate a manual switch or other device.

(C) The Sudden Brake Indicator Hazard Light may be activated when the vehicle is not in motion. Most rear end collisions occur when the lead vehicle is stopped. If the stopped lead vehicle driver notices in his rear view mirror that another driver is approaching too fast, he simply has to depress his brake pedal with greater pressure to instantly activate the hazard light. No time is lost as the driver's foot is already on the brake.

(D) In emergency situations when a vehicle goes off the road and comes to a stop, the hazard light may be instantly activated by harder depression of the brake pedal. This is primarily important during night time freeway driving. Precious seconds are not lost while searching for the manually activated hazard light switch until it is turned on.

(E) Most importantly, there is no chance of drivers becoming desensitized to the Sudden Brake Indicator Hazard Light as it is rarely used. Other proposed systems were designed to be activated during all braking conditions. With these systems, either flashing or steady burning, this is tantamount to just another brake light that sooner or later would be regarded the same as existing brake light designs.

ATTACHMENT

Mr. Paul J. Rice Chief Counsel National Highway Traffic & Safety Administration 400 7TH Street, Room 5219 Washington, DC 20590

REFERENCE: SUDDEN BRAKE INDICATOR HAZARD LIGHT

Dear Mr. Rice,

Please allow a written opinion for allowance of a Sudden Brake Indicator vehicular hazard lighting system described as follows.

A separate hazard brake light system that is activated only when a predetermined threshold of pressure is reached upon physical depression of a vehicle's brake pedal. The hazard brake light system primarily consists of two components: (A) A pressure sensitive electronic switch mounted within the vehicle's brake pedal assembly that is activated only when a predetermined amount of foot pressure is applied to the brake pedal that is usually greater than those pressures applied during normal driving conditions (as an example, foot pressure application greater than 25 lbs. of force). (B) A light or light assembly that is mounted to the rear of the vehicle that when illuminated, may warn other vehicles of a sudden braking or other hazard situation.

The hazard light may be red or amber in color and steady burning or flashing as required to warn other drivers that a hazard situation may be occurring so that special driving attention should be employed.

The hazard brake light system will be mounted in one of two places. (A) The high mount stop light outer housing will be slightly expanded to contain a separate inner housing or housings with separate bulb and lens coverings from that of the high mount stop light. (B) Elsewhere on the rear of the vehicle so as not to conflict with the other lighting functions mandatory on the vehicle.

The switch, hardware, wiring, lights, lenses and housings will conform to all existing Automotive Codes of Federal Regulations. The hazard light system will be design manufactured and installed for use only on original equipment manufactured vehicles.

Sincerely,

Richard Horian

President

ID: nht92-2.45

DATE: 11/05/92

FROM: KIM WELSH -- EMMETT KOELSCH COACHES

TO: PUBLICATIONS DEPARTMENT, DOT

ATTACHMT: ATTACHED TO LETTER DATED 12-1-92 (EST.) FROM PAUL J. RICE TO KIM WELSH (A40; PART 571.3)

TEXT: Please forward a copy of the "Motor Vehicle Safety Standards" regarding School Buses and other Transit type vehicles. Please use the above address. If there are any questions please use our number list above.

Thank You!

ID: nht92-2.46

DATE: 11/03/92

FROM: PAUL JACKSON RICE -- CHIEF COUNSEL, NHTSA

TO: JAMES A. WESTPHAL -- OSHKOSH CHASSIS DIVISION, OSHKOSH TRUCK CORPORATION

ATTACHMT: ATTACHED TO LETTER DATED 9-2-92 FROM JAMES A. WESTPHAL, OSHKOSH, TO NHTSA ADMINISTRATOR (OCC 7745)

TEXT: This letter responds to your inquiry about which Federal Motor Vehicle Safety Standards would be applicable to certain incomplete vehicles (chassis less cab) that you manufacture for motor homes. You anticipate that the motor homes will have a gross vehicle weight rating (GVWR) over 10,000 pounds but less than 26,000 pounds.

Your letter indicated that Oshkosh plans to install brake systems in the two models which use compressed air to provide braking power, and hydraulic fluid to transmit the energy to the hydraulically activated disc brakes at each wheel. You stated that this system is commonly known as "air-over-hydraulic."

The following is in response to your four specific questions:

1. Must the brake system comply with the requirements of Standard No. 121 applicable to trucks?

The answer to question number one is yes. The agency classifies air-over-hydraulic brake systems as air brake systems. Accordingly, vehicles equipped with air-over-hydraulic brake systems are required to comply with the requirements of Standard No. 121. I am enclosing a July 20, 1984 interpretation letter to Ms. Margaret Moore Oba which discusses this issue at length.

2. Must the brake system comply with the requirements of Standard No. 105 applicable to multipurpose passenger vehicles?

The answer to question number two is no. Standard No. 105 only applies to vehicles with hydraulic brake systems. Since your system is air-over-hydraulic, it is considered to be an air brake system and not a hydraulic brake system.

3. If Standard No. 121 compliance is required must the hydraulically powered disc brakes comply with Section S5.4 Service brake system -- dynamometer tests?

The answer to question number three is yes. The requirements of S5.4 are among the requirements specified in Standard No. 121 for each vehicle equipped with air brakes.

4. If compliance to parts of both Standards 121 and 105 is required, must the system meet the requirements of the following sections in Standard No. 105: S5.1.2 Partial Failure, S5.1.3 Inoperative brake power assist or brake power unit, and/or S5.3 Brake system indicator lamp.

As indicated above, air-over hydraulic brake systems are not required to meet the requirements of Standard No. 105.

I hope this information is helpful. If you have any further questions about NHTSA's safety standards, please feel free to contact Marvin Shaw of my staff at this address or by telephone at (202) 366-2992.