In the period from 12 March 2020 to 1 month after the end of the state of emergency, Regulation 2020-306 of 25/03/2020 provides in particular for the extension of the period of validity of exceptional transport permits to 2 months after this period
The permits that have expired since 12/3 and expire until 1 month after the end of the state of emergency are therefore considered to be valid for 2 months longer than the expiration date stated on the permit itself.
Source: Legifrance