quencies tariff principles that allow efficient access to public information and communications systems; “operator” means a person who owns, operates or provides a regulated information and communications system or information and communications service; “operator having significant market power” means a legal entity which, either on its own or in conjunction with other legal entities, holds a position equivalent to a dominant position, that is, a company which has a significant capacity to act in a manner independent of its competitors, its customers and ultimately consumers; “prescribed” means set out in this Act or by regulations made under this Act; “private communications service” means an information and communications service provided by an authorized provider for(a) its own use over a private information and communications system; or (b) the use of third parties, within an identifiable, wholly self-contained private information and communications system which does not inter-connect with a public information and communications system; “public communications network” means an information and communications network used wholly or mainly for the provision of publicly available information and communications services; “public telephone network” means an information and communications network which(a) is used to provide publicly available telephone services; and (b) supports the transfer between network ter20