Maritime Fuel Tax Parity Act

S 549, the Maritime Fuel Tax Parity Act, expands a federal tax exemption for alternative motorboat fuels to cover vessels operating exclusively between Atlantic or Pacific U.S. ports (including territories). It amends the tax code to include these specific vessels under the existing exemption for fuel used by vessels described in section 4042(c)(1). The change applies to fuel sold for use after December 31, 2025, directly affecting commercial vessels limited to coast-to-coast U.S. trade. This policy modifies tax treatment without altering broader fuel regulations or creating new requirements.