Ala. Code § 40-23-4.8 (2026)
(a) The gross receipts from the sale of aircraft replacement parts, components, systems, sundries, and supplies affixed to, used on, or that became part of, aircraft brought into the state and used, or to be used, by a certified or licensed air carrier to undergo conversion, reconfiguration, or general maintenance while temporarily within this state are exempt from the state sales and use taxes provided for in Sections 40-23-2 and 40-23-61.
(1) Under this section, an aircraft shall be considered not permanently domiciled in Alabama if either of the following non-exclusive conditions are true:
(Act 2025-240, §1.)