6980.15. No person engaged in performing any service requiring a license under this chapter may bring or maintain any action in any court of this state for the collection of compensation for the performance of any act or agreement, without alleging and proving, that the person was duly licensed at all times during the performance of the act or agreement.
(Added by Stats. 1993, Ch. 1263, Sec. 5. Effective January 1, 1994.)