Proof of being Licensed.

4. In any proceedings to be instituted against any person for having or keeping an unlicensed theatre house room building garden or place if it shall be proved that the same is used for the public performance of entertainments of the stage as hereinbefore described the burden of proof that such theatre house room building garden or place is duly licensed or authorised shall be on the party accused and until the contrary shall be proved such theatre house room building garden or place shall be taken to be unlicensed.