The district attorneys of the various counties shall be paid monthly salaries as adopted in the salary plan provided for in ORS § 240.240 (2), to include salary adjustments awarded management service employees. [1991 c.432 § 2; reenacted by 1993 c.290 § 2; reenacted by 1995 c.9 § 2; reenacted by 1997 c.75 § 2]