(d) a product or service of a kind that is similar to a product or service covered by paragraph (a), (b) or (c); “register” means any one of the registers established or maintained by the Commission for the purposes of this Act; “register of opinions” means the register of opinions maintained under section 97 or 21 0, or any other relevant section; “required applications service” means an applications service which is in a list determined by the Minister under section 192; “spectrum” means the continuous range of electromagnetic wave frequencies up to and including a frequency of 420 terahertz; “spectrum assignment” means the assignment issued under section 159; “spectrum plan” means the spectrum plan developed under section 172; “technical code” means a voluntary industry code prepared under Chapter 3 of Part VII ; “technical standards forum” means a forum designated under section 184; “transmit” or “transmission” means to cause any emission of unguided electromagnetic energy in any part of the spectrum; “voluntary industry code” means a voluntary industry code prepared under Chapter 9 of Part V. PART II MINISTERIAL POWERS AND PROCEDURES Chapter 1 - Ministerial Direction 7. Direction by the Minister. (1) The Minister may, from time to time, issue directions to the Commission on the exercise of the Commission’s powers and the performance of the Commission’s functions and duties under this Act, whether of a general character or otherwise. (2) Any Ministerial direction shall be consistent with the objects and provisions of this Act which are relevant to the particular matter or activity. (3) The Commission shall exercise its powers conferred under this Act in a manner which is consistent with a Ministerial direction. (4) Every Ministerial direction shall be registered by the Commission as soon as practicable. (5) A direction shall come into operation on the date of registration or such later date as the Minister may specify in the written instrument. (6) A direction shall expire on such date as the Minister may specify in the written instrument or, if no date is specified, the direction shall be in operation until the direction is revoked.