53 Pa. Stat. § 3297
The commission, under which the provisions of this act shall be carried out, in any township of the first class, borough, or city, shall have power to employ and pay such superintendents, engineers, foresters, tree-wardens, or other assistants, as the proper performance of the duties devolving upon it shall require; and to make, publish and enforce regulations for the care of, and to prevent injury to, the trees on the highways of any township, borough, or city accepting the provisions of this act; and to assess suitable fines and penalties for violations of this act, provided such regulations shall have been published at least twice in one or more, not exceeding two, newspapers of the township, borough, or city, involved, after having been submitted to and being approved by the commissioners of the township of the first class, or the councils of the borough or city affected; and such fines and penalties, so assessed for violations of this act, shall become liens upon the real property of the offender, and be collectible by the constituted authorities as liens for taxes upon real property are now collected.
53 P.S. § 3297