(2) The amounts referred to in subsection (1) of this section are:
(a) Amounts paid as motor vehicle fuel tax under ORS 319.020 and 319.530 that are not refunded; and
(b) Special use fuel license fees paid under ORS 319.535.
(3) The Department of Transportation shall determine the amount of moneys to be transferred under this section at quarterly intervals. [1999 c.977 §17; 2011 c.360 §12; 2014 c.13 §12]