(a) Emergency regulations.--The agency and the Department of Environmental Protection shall adopt emergency regulations directing the operators of all unconventional wells within this Commonwealth to do all of the following:
(b) Definitions.--As used in this section, the following words and phrases shall have the meanings given to them in this subsection unless the context clearly indicates otherwise:
"Unconventional formation." A geological shale formation existing below the base of the Elk Sandstone or its geologic equivalent stratigraphic interval where natural gas generally cannot be produced at economic flow rates or in economic volumes except by vertical or horizontal well bores stimulated by:
"Unconventional well." A bore hole drilled or being drilled for the purpose of or to be used for the production of natural gas from an unconventional formation.
35 Pa.C.S. § 7321