(2) A district attorney shall not conduct prosecutions under this section when:
(a) A city attorney is prosecuting a violation under ORS chapter 153; or
(b) The district attorney is prohibited from appearing in a violation proceeding under the provisions of ORS 153.076. [Amended by 1975 c.451 §170; 1981 c.626 §1; 1981 c.692 §6a; 1999 c.1051 §116]