(a) The term municipality means a county, city, town or village in this State.

(b) The term secretary means the Secretary to the Public Service Commission.

(c) The term person means any individual, corporation, public benefit corporation, political subdivision, governmental agency, municipality, partnership, cooperative association, trust or estate.

(d) The term certificate means a certificate of environmental compatibility and public need.

(e) The term facility or transmission facility means:

The term facility or transmission facility does not include any electric transmission line located wholly underground in a city with a population in excess of 125,000, or a primary transmission line (as such term is used in the Federal Power Act [16 U.S.C. 791—a-828c]) approved by the Federal Energy Regulatory Commission in connection with a hydroelectric facility or any fuel gas transmission line that is located wholly underground in a city or wholly within the right-of-way of a state, county or town highway or village street (as those terms are defined in article 1 of the Highway Law and article 6 of the Village Law), or that replaces an existing transmission line, including appurtenant facilities, and extends a distance of less than one mile.

(f) The term application means the application form required by section 85-2.8 of this Subpart.

(g) The term appurtenant facilities means installations (excluding gas compressors) that are merely auxiliary or appurtenant to a fuel gas transmission line, such as: valves; drips; measuring and regulating equipment; yard and station piping; cathodic protection equipment; gas cleaning, cooling and dehydration equipment; residual refining equipment; water pumping, treatment and cooling equipment; electrical and communication equipment; and buildings.