PART XI TELECOMMUNICATIONS EQUIPMENT 61. Equipment Certification (1) The LTA may issue regulations, rules or orders regarding one or more of the following: (a) requiring that certain types of telecommunications equipment be certified or approved prior to being imported, commercially supplied or attached to any telecommunications network; (b) identifying criteria for certification and/or standards for approval of telecommunications equipment for use in connection with telecommunications services or telecommunications networks; (c) identifying domestic or foreign organizations or testing facilities for certification or approval of telecommunications equipment for use in connection with telecommunications services or telecommunications networks; or (d) establishing a register of certified or approved types of telecommunications equipment, criteria for certification and standards for approval. (2) The LTA may enter into mutual recognition or similar agreements with authorities in other countries to provide for the recognition of equipment certification or type approvals conducted in the other country and/or in Liberia. PART XII NUMBERS 62. National Numbering Plan (1) The LTA 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 LTA shall have due regard for the existing allocation of numbers. (3) The LTA 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 be effected.