Section 31: The Board shall establish and manage the numbering plan. It shall ensure equal and simple access by users to the different telecommunications networks and services, as well as the equivalence of numbering schemes. Section 32: (1) The Board shall assign prefixes and numbers or sets of numbers to operators in a transparent, objective and non-discriminatory manner. (2) The conditions for use of such prefixes, numbers or sets of numbers provided for in Subsection 1 above shall be specified, as the case may be, by the specifications of the operator or by the assignment decision notified him. CHAPTER VI PUBLICATION OF THE LISTS OF SUBSCRIBERS AND FOREIGN INSTITUTIONS Section 33: The lists of subscribers or users declared by operators of public telecommunications networks shall be published freely, subject to the declaration thereof to the service in charge of telecommunications. Section 34: Foreign institutions and bodies governed by international law shall carry out their telecommunications activities in the national territory in accordance with the agreements signed and ratified by the Republic of Cameroon. Such activities shall, in accordance with this law, be subject to authorization except otherwise stipulated by the aforementioned agreements. CHAPTER VII TERMINAL EQUIPMENT Section 35: (1) The marketing of terminal equipment shall be free. However, where such equipment is meant to be connected to a public network, it shall be subject to homologation under the conditions provided by this law. (2) In any case, homologation shall be required for radio frequency installations, whether or not they are intended for connection to a public network. (3) The purpose of the homologation referred to in Section 35 (1) and (2) above shall be to ensure compliance with the essential requirements defined in Section 3(7), and to verify the conformity of terminal equipment and radio frequency installations with the technical norms and specifications in force in Cameroon, as well as their interoperability. (4) The procedure for homologation of radiofrequency installations intended for connection to the networks referred to in Section 9(1) shall be laid down by an instrument of the Administration in charge of telecommunications. CHAPTER VIII CRYPTOLOGY SERVICES