(2) Any person issued a letter of authority under ORS 479.545 (1985 Replacement Part) may continue to make electrical installations under ORS 479.510 to 479.945 on property owned or controlled by an agency of the state. [1981 c.815 §7; 1985 c.568 §1; 1987 c.414 §34a; 2003 c.14 §322]