2005, No.20 Telecommunications Act 2005 139 (d) maintain a register of certified or approved types of telecommunications equipment, criteria for certification and standards for approval. (2) Marketing or selling telecommunications equipment is not subject to authorized except as provided in this section. (3) The Regulator may enter into mutual recognition agreements with authorities in other countries to provide for mutual recognition of, certification and approval of telecommunications equipment in other countries and/ or Samoa. PART XI NUMBERS 61. National Numbering Plan-(1) By order the Regulator shall prepare, publish and manage a National Numbering Plan and shall assign numbers and number ranges to service providers and customers in accordance with the National Numbering Plan. (2) In preparing and managing the National Numbering Plan, the Regulator shall have due regard for the existing allocation and assignment of numbers. (3) The National Numbering Plan shall take into account any existing or proposed regulation for the establishment of fees for telecommunications numbers under section 10. (4) The Regulator may modify the National Numbering Plan by publishing a notice to customers and service providers at a reasonable time prior to the date when the modification is to me into force. (5) The National Numbering Plan shall be consistent with the requirements of international agreements, commitments, conventions, regulations and recommendations to which Samoa has subscribed or is otherwise subject to. (6) All service providers shall be required to use numbers assigned to them by the Regulator in accordance with the National Numbering and shall ensure that these numbers are used efficiently and in accordance with the National Numbering Plan.