2. a. Notwithstanding the provisions of P.L.1966, c. 30 (C.54:32B-1 et seq.) to the contrary, the use within this State of a boat or other vessel for temporary periods, not totaling more than 30 calendar days in a calendar year, shall not be subject to the compensating use tax imposed by section 6 of P.L.1966, c.30 (C.54:32B-6), provided that:
(1) the boat or other vessel is legally operated by the resident purchaser and meets all current requirements pursuant to applicable federal law or pursuant to a federally-approved numbering system for boats and vessels adopted by another state, and
(2) the resident purchaser is not engaged in or carrying on in this State any employment, trade, business, or profession in which the boat or vessel will be used in this State.
b. If any of the conditions specified by subsection a. of this section have not been met, or after having been met fail to continue to be met, the exemption provided by subsection a. of this section shall not apply.