11. Pricing parameters. (1) The Commission shall adopt a pricing formula that reflects the economic value of frequency spectrum in order to encourage efficient use of frequency spectrum and stimulate growth. (2) The pricing formula adopted under paragraph formula shall take into account the following factors— (a) size of spectrum assigned; (b) frequency band and level of congestion within the band; (c) market demand; (d) power output and; (e) geographical usage; and (f) such other factors as the Commission may from time to time determine (3) The Commission shall review and publish the pricing formula for frequency spectrum at least once in every three years. 12. Type approval and inspection. (1) A licensee shall not use any frequency spectrum unless the radio equipment in respect of which an assignment is sought has been duly type approved or type accepted by the Commission. (2) Upon installation of the radio communication system, the licensee shall ensure that the system is inspected and certified by the Commission to be operating in accordance with the Act and the Regulations made thereunder. 13. Monitoring and inspection. (1) The Commission shall monitor all emissions from licensed stations to ensure the efficient utilization and compliance with licensed parameters. (2) The licensee shall permit unlimited access by the Commission’s authorized officers to the licensee’s installations at reasonable times for the purposes of inspection and verification of operational parameters.