Outer Continental Shelf Energy Access Now Act or the OCEAN Act This bill amends the Outer Continental Shelf Lands Act to limit the President's authority to prohibit oil and gas leasing on the outer Continental Shelf. The President may prohibit, through a rule making, oil and gas leasing on areas of the outer Continental Shelf located in a national marine sanctuary. Any suspension of operations under a lease arising from a state of war or declaration of national emergency shall be for 90 days and may be renewed. The bill rescinds existing moratoriums on oil and gas leasing on areas of the outer Continental Shelf other than marine sanctuaries and national monuments. The President may not declare or reserve any ocean waters or lands beneath ocean waters as a national monument.