Section 114.23 - Maximum period(a)A.T.A. carnet. No A.T.A. carnet with a period of validity exceeding 1 year from date of issue shall be accepted. This period of validity cannot be extended.(b)TIR carnet. A TIR carnet may be accepted without limitation as to time provided it is initially "taken on charge by a customs administration (United States or foreign) within the period of validity shown on its front cover."(c)TECRO/AIT carnet. A TECRO/AIT carnet shall not be issued with a period of validity exceeding one year from the date of issue. This period of validity cannot be extended and must be shown on the front cover of the carnet.T.D. 71-70, 36 FR 4491, Mar. 6, 1971, as amended by T.D. 82-116, 47 FR 27262, June 24, 1982; T.D. 85-180, 50 FR 42517, Oct. 21, 1985; T.D. 98-10, 63 FR 4168, Jan. 28, 1998