(1) Tariffs for electronic communications services, except those which are regulated by the Authority under this section shall be determined by service providers in accordance with the principles of supply and demand.

(2) The Authority may establish price regulation regimes, which may include the setting, review and approval of prices by Regulation, where

(a) there is only one network operator or service provider or one network operator or service provider that has significant market power,

(b) a sole network operator or service provider or a network operator or service provider with significant market power and cross-subsidises another electronic communications network or service, and

(c) the Authority detects anti-competitive pricing or acts of unfair competition.

(3) A service provider shall provide rates that are fair and reasonable and shall not discriminate among similarly situated persons, including the service provider and anybody corporate with which it is affiliated except as otherwise provided in this Act.

(4) The Authority may prescribe a method to regulate the cost of the service for any public electronic communications service in which a service provider is dominant by establishing a ceiling on the cost, or by other methods that it considers appropriate.

(5) A service provider shall publish the prices, terms and conditions for its public electronic communications services at the times and in the manner that the Authority shall specify and the prices, terms and conditions shall, be the lawful prices, terms and conditions for the services subject to this Act and the conditions of the licence.