A private transfer fee obligation recorded or entered into in this Commonwealth on or after the effective date of this chapter does not run with the title to real property and is not binding on or enforceable at law or in equity against a subsequent owner, purchaser or mortgagee of an interest in real property as an equitable servitude or otherwise. A private transfer fee obligation recorded or entered into in this Commonwealth before the effective date of this chapter is presumed valid and enforceable, provided that it complies with the provisions of sections 8106 (relating to disclosure) and 8107 (relating to notice requirements for existing private transfer fee obligations) and all other applicable law.