a) Any applicable international treaties, commitments, recommendations or standards legally binding upon Timor-Leste, including those of the International Telecommunications Union; b) The likelihood of significant interference; and c) The objective provided for in article 2 of the present Decree-Law. 3. The Authority may modify or withdraw any exemption previously established pursuant to paragraph 1 of this article. 4. The making, modifying or withdrawing of exemptions pursuant to the article shall be subject to paragraph 4 of article 19. Article 65 Suspension, revocation and amendment of licence and vacation of radio-frequency spectrum 1. The Authority may, without compensation, amend the conditions for a radio-frequency spectrum licence or declare vacant any radio-frequency spectrum that has been assigned to the extent necessary to comply with international treaties and other international commitments undertaken by the Democratic Republic of Timor-Leste. 2. The Authority may, without compensation, suspend, revoke or amend the conditions for a radio-frequency spectrum licence or declare vacant any radio-frequency spectrum that has been assigned if: a) The licensee has entered into liquidation, taken any action for its voluntary liquidation or dissolution, or is the subject of any order by a competent court for its compulsory liquidation or dissolution; b) The licensee misled the Authority by making a false statement of a material fact or omitting to state a material fact of relevance to the Authority in connection with the award to it of its licence for such radio-frequency spectrum; c) The licensee has breached a material requirement for payment of radio-frequency spectrum fees due and payable; d) The licensee has failed without reasonable justification to produce material information or documents requested by the Authority as required pursuant to the present Decree-law or any regulatory measure issued thereunder in relation to such radio-frequency spectrum; or e) The licensee has failed to comply with a provision under this Chapter or any regulatory measure in relation to such radio-frequency spectrum, approved pursuant to the present Decree-law.