No manufactured home community owner or operator may restrict the making of any interior improvements in a manufactured home so long as such improvements are in compliance with applicable building codes and other provisions of law; nor may he restrict the installation, service or maintenance of an electric or gas appliance in a manufactured home or charge any fee for such installation unless the fee reflects the actual cost to the manufactured home community owner or operator of such installation or its use.
68 P.S. § 398.7