(1) The Office of Rural Health shall establish criteria for certifying individuals eligible for the tax credit authorized by ORS 315.613. Upon application therefor, the office shall certify individuals eligible for the tax credit authorized by ORS 315.613.
(2) The classification of rural hospitals described in ORS 315.613 (3)(a) to (d) for purposes of determining eligibility under this section shall be the classification of the hospital in effect on January 1, 1991.