9. Every person who keeps or operates a place of amusement may be sued personally for any infringement of the provisions of paragraph 2 of section 8, committed by anyone in his employ, unless he prove that such infringement was committed without his knowledge and authorization.
In the event of a third condemnation for an infringement of the provisions of paragraph 2 of section 8, rendered against the person keeping or operating the place of amusement, the license shall be cancelled.
R. S. 1964, c. 76, s. 10.