As part of Boris Johnson’s Brexit trade deal, EU ships will continue to have access to UK waters until the end of 2026.
However, they will need to prove that they were active in the region between 2017 and 2020 to obtain a permit.
According to Bertrand Sorre, deputy for the 2nd arrondissement of La Manche, the first batch of authorizations would expire on September 30.
Speaking to the French news site Cosmo Sonic, he said French fishermen do not yet know if these will be extended.
Mr Sorre said: “This means that in a few days these fishermen have no idea if they will be able to continue doing their jobs.”
Concerns were also expressed by Stéphanie Yon-Courtin, a French MEP of Emmanuel Macron En Marche! Party.
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She accused authorities in Britain, Jersey and Guernsey of “delaying the implementation of the Brexit deal”.
Ms Yon-Courtin, MEP, said: “In the face of British bad faith, it is time to act.
The politician added: “As of January 1, only a handful of licenses have been issued, and that is a real affront. An insult to our fishermen.
On Saturday, more than 100 French fishermen demonstrated in Armanville, Normandy, to demand the renewal of their licenses.
The site was chosen because an Armanville cable is used to help power Jersey.
In May, the island was the target of dozens of protesting French fishing vessels, prompting the dispatch of two Royal Navy patrol boats to maintain order.
Additional reporting by Maria Ortega
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