(iv) Police, fire brigade, ambulance and other emergency services; (v) Maritime safety and civil aviation services; (vi) Public services of other Government ministries and authorities; and (vii) Amateur use. 4. The Authority should establish a coordination committee comprising representatives of relevant authorities and departments to advise it on its functions and responsibilities pursuant to subparagraph i) of the preceding paragraph. 5. The Authority shall maintain and publish on its website a database of current allocations and usage of radio-frequency spectrum in Timor-Leste. Article 61 Radio spectrum licensing 1. No person may use radio-frequency spectrum or operate radio equipment in Timor-Leste, unless that person: a) Is licensed to do so under a radio-frequency spectrum licence; or b) Is exempt pursuant to this Chapter. 2. In accordance with a national radio-frequency spectrum plan, the Authority shall: a) Issue radio-frequency spectrum licences on the basis of frequencies, geography, equipment or other characteristic, or a combination thereof; Establish class licences setting out standard terms and conditions, any applicable qualification criteria and other requirements for the operation of specified classes of radio equipment within specified frequency bands at or below specified power levels; and b) c) Establish procedures, rules and guidelines relating to radio-frequency spectrum licensing, including setting out the manner in which licence applications are to be made, processed and approved. 3. The Authority shall restrict the number of radio-frequency spectrum licences available for any particular frequency band only to the extent deemed necessary to ensure efficient use of radio-frequency spectrum taking into account supply and demand for frequencies in the particular frequency band. 4. If the Authority intends to restrict the number of radio-frequency spectrum licences for a radio-frequency spectrum in particular frequency bands, it: a) Shall issue such licences pursuant to a competitive selection process; and