As used in this part, the following definitions apply:
(1) "Department" means the department of public service regulation provided for in Title 2, chapter 15, part 26.
(2) "Regulated companies" means all organizations, corporations, associations, or other public or private entities which now are or may hereafter become subject to regulation in any manner by the department of public service regulation, the public service commission, or any successor agency. The term does not include motor carriers regulated pursuant to Title 69, chapter 12.