Interpretation ID: aiam0563
Crestview Service Center
9201 W. Pico Boulevard
Los Angeles
CA 90035;
Dear Mr. King: This is in reply to your letter of January 7, 1972, regardin recordkeeping of tires manufactured before May 22, 1971.; Tires manufactured prior to May 22, 1971, are not subject to th recordkeeping requirements of Regulation Part 574.; Regulation Part 574 became effective May 22, 1971, for tire manufactured on and after that date.; Sincerely, E. T. Driver, Director, Office of Operating Systems, Moto Vehicle Programs;