The California Clean Coast Act of 2025 proposes a permanent prohibition on new oil and gas preleasing, leasing, and related activities in the Outer Continental Shelf located off the coast of California. This legislation would amend the Outer Continental Shelf Lands Act to establish this ban, aiming to protect the state's coastline from future offshore drilling expansion. The bill's provisions ensure that while new activities are halted, any rights under existing leases issued before the date of enactment will remain unaffected. This means current operations under previously granted leases can continue, but no new leases or associated activities will be permitted in these specified offshore areas.