3 Pa. C.S. § 4212
Aquacultural facilities licensed pursuant to this chapter are not wetlands under 25 Pa. Code Ch. 105 Subch. A (relating to general provisions) so long as such facilities were created and have been continuously operating for any purpose, including effluent mitigation, prior to September 23, 1985. Facilities created on or after September 23, 1985, are not wetlands under any statute or regulation of this Commonwealth so long as the facilities are or were not created nor are currently maintained on wetlands. Normal maintenance and improvements on facilities created prior to September 23, 1985, are permissible notwithstanding any statutory provision relating to wetlands. Permits issued by the Commonwealth for normal maintenance and improvements of facilities created prior to September 23, 1985, are not required.
3 Pa.C.S. § 4212