NMFS, announce a 12-month determination on a petition to revise the critical habitat designation for the North Pacific right whale (Eubalaena japonica) under the ESA. Based on their review of the best available information on North Pacific right whale habitat use, they intend to revise the critical habitat. This finding describes how they intend to proceed, particularly regarding analysis and review of the relevant data and information that have become available since North Pacific right whale critical habitat was designated in 2008. The finding announced in this document was made on 26 September 2023. POC is Jenna Malek, NMFS Alaska Region, jenna.malek@noaa.gov or (907) 271–1332. (Federal Register 26 September 2023 [Proposed Rule] Pages 65940-65944)