This subchapter shall not be construed to be in derogation of zoning ordinances or ordinances for the control of salvage yards now or hereafter established within the proper exercise of the police power granted to municipalities, if those ordinances impose stricter limitations upon salvage yards. If the limitations imposed by this subchapter are stricter, this subchapter shall control. (Added 1969, No. 98, § 1; amended 2009, No. 56, § 8.)