The following words and phrases when used in this chapter shall have the meanings given to them in this section unless the context clearly indicates otherwise:
"Local government unit." A political subdivision of the Commonwealth.
"Normal agricultural operation." As defined under section 2 of the act of June 10, 1982 (P.L. 454, No. 133) , entitled "An act protecting agricultural operations from nuisance suits and ordinances under certain circumstances."
"Unauthorized local ordinance." An ordinance enacted or enforced by a local government unit which does any of the following:
3 Pa.C.S. § 312