Maximum period.
19 C.F.R. § 114.23
in effectEffective: 2024-07-01(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.
Source: eCFRURL: https://www.ecfr.gov/api/versioner/v1/full/2024-07-01/title-19.xmlFetched: 7/26/2026
