It shall be unlawful for an officer, trustee, association, corporation, or person in control of any cemetery, or a public burial ground, in the Commonwealth of Pennsylvania, to make or enforce a rule or by-law prohibiting, or to prohibit, the erection of headstones furnished or approved by the United States Government, or by any county of the Commonwealth of Pennsylvania, for the graves of soldiers, sailors, and marines, or members of the enlisted nurse corps, who have served in the military or naval forces of the United States, or of the commonwealth; and any rule or by-law heretofore passed by any cemetery association or corporation, trustees or persons having control of any cemetery or burial ground, prohibiting the erection of such headstones, shall be void and of no effect. Any officer, person, association, corporation or person, seeking or attempting to enforce any such rule, or prohibiting the erection of any such headstone, shall, upon conviction thereof in a summary proceeding before a magistrate, alderman, or justice of the peace,¹ be sentenced to pay a fine of not less than ten dollars nor more than one hundred dollars for each offense.