52 Pa. Code § 57.81
The following words and terms, when used in this subchapter, have the following meanings, unless the context clearly indicates otherwise:
Applicant for electric service-The developer of a recorded plot plan consisting of five or more lots, or of one or more five unit apartment houses.
Developer-The party responsible for constructing and providing im- provements in a development, that is, streets, sidewalks and utility-ready lots.
Development-A planned project which is developed by a developer/applicant for electric service set out in a recorded plot plan of five or more adjoining unoccupied lots for the construction of single-family residences, detached or otherwise, mobile homes or apartment houses, all of which are intended for year-around occupancy, if electric service to the lots necessitates extending the utility's existing distribution lines.
Distribution line-An electric supply line of untransformed voltage from which energy is delivered to one or more service lines.
Service line-An electric supply line of untransformed voltage from which service is delivered to the residence.
Subdivider-The party responsible for dividing a tract of land into building lots which are not to be sold as utility-ready lots.
Subdivision-A tract of land divided by a subdivider into five or more adjoining unoccupied lots for the construction of single-family residences, detached or otherwise or apartment houses, all of which are intended for year-around occupancy, if electric service to the lots necessitates extending the utility's existing distribution lines.
52 Pa. Code § 57.81
This section cited in 52 Pa. Code § 57.19 (relating to line extensions); 52 Pa. Code § 57.88 (relating to subdivisions); and 52 Pa. Code § 69.43 (relating to notice lead-time).