(a) As used in this section, "petroleum refinery" has the meaning given in section 115C.02, subdivision 10a .
(b) By January 1, 2022, each petroleum refinery operating in the state shall maintain or contract for a full-time paid on-site fire department regularly charged with the responsibility of providing fire protection to the refinery that is sufficiently trained, equipped, and staffed to respond to fires at the refinery and to conduct inspections to prevent fires.