(b) Any user of frequencies who is subject to the provision of paragraph (a) of this Article shall inform the Authority in writing that such Frequencies are available for Assignment by the Authority. Article 35 Frequency Revision and Reallocation (a) The Authority shall, as from the effective date of this Law, revise all the conditions of the existing Frequency Licenses and shall have the right to modify them in accordance with procedures to be determined, in coordination with their occupants, for the purpose of ensuring the optimum use of the Radio Frequency Spectrum. (b) All Radio Frequency Spectrum users shall, as of the effective date of this Law, submit complete data about the Frequencies they are using to the Authority within a period to be determined by the Authority. The Authority shall grant them a Frequency License in compliance with the conditions it determines and in accordance with their actual needs, in a manner consistent with the National Frequency Plan, and taking into account the present situation of Operators. Article 36 Compliance with International Treaties and Other Legislation (a) In exercising the powers and functions provided for in this chapter, the Authority shall comply with the obligations arising from international treaties to which Syria is a party. (b) The provisions of legislations regulating air and maritime traffic and meteorology shall also be respected. Chapter Seven - Numbering Article 37 The National Numbering Plan (a) The Authority shall prepare the National Numbering Plan. It shall oversee its implementation and ensure that it is complied with, for use to provide Telecommunication Services, in accordance with the provisions of this Law. (b) When preparing the National Numbering Plan, the Authority shall consult, in a transparent and nondiscriminatory manner, with the relevant authorities. (c) It is prohibited to use a numbering for purposes other than those set forth in the National Numbering Plan with respect to that number. (d) The Executive Provisions shall set forth the procedures for number assignment, and the conditions to reject or withdraw applications for number assignment. Chapter Eight - Type Approval 27