(2) In a proceeding for an injunction under subsection (1) of this section, an applicant or licensee may not, as a defense, litigate collaterally any matter concerning the refusal to grant or the revocation or suspension of a license required by or issued under ORS 621.070, 621.072, 621.161, 621.171 or 621.266 if the applicant or licensee was heard or might have been heard on that matter directly in an administrative hearing under ORS 183.413 to 183.470, or on an appeal from such a hearing. [1955 c.714 §1; 1961 c.425 §13; 1999 c.197 §6]