There is a reported new Customs and Border Protection (CBP) policy of refusing to process subsequent L-1 petitions at certain Ports of Entry (POEs) presented by Canadians pursuant to NAFTA. A Canadian L-1 beneficiary seeking admission at a port of entry seeks only an extension of the petition validity period and not an extension of stay. CBP thus retains jurisdiction to process these petitions under NAFTA. Renewal and extension petitions will instead need to be filed with USCIS.
Iandoli Desai and Cronin, P.C. is monitoring this and will provide any updates as they become available.