subject to the approval of the Authority. The modified agreement shall be filed with the Authority for approval no later than seven (7) working days from the date of the execution of such modification. 2) If parties to a Wholesale Roaming agreement filed with the Authority in accordance with Article 13 (1) of this Directive fail to agree on the terms and conditions for amending such agreement, the Authority may intervene at the request of either party, or at its own discretion, to set such terms in accordance with the Authority’s Dispute Resolution Directive. 15. Termination of a Wholesale National Roaming Service Agreement 1) The termination of a Wholesale Roaming agreement shall be strictly in accordance with the terms in such agreement. 2) If a party to a Wholesale Roaming agreement, filed with the Authority, intends to terminate such agreement, it shall give not less than a sixty (60)-day written notice to the other party, specifying the grounds for termination. 3) Where there is a breach of a Wholesale roaming agreement, the operator providing the notice shall give the other party not less than thirty (30) working days to remedy the alleged breach, and if the party in breach, fails to remedy such breach within that period, it may then terminate the agreement, or seek the Authority’s intervention in accordance with the Authority’s Dispute Resolution Directive. 4) A party to a Wholesale Roaming agreement that has been terminated, may seek the Authority’s intervention and in such instance, the Authority may intervene in accordance with the Authority’s Dispute Resolution Directive. 5) If a Wholesale Roaming provider, terminates a Wholesale Roaming agreement, it shall notify the Authority in writing not later than seven (7) working days after the termination of such agreement, and provide a copy of the notice of termination. 16. Reference Offer for Wholesale National Roaming Services 1) All Telecommunications Operators which the Authority has determined to have SMP in a relevant market for wholesale mobile access and call origination services shall file a Reference Offer with the Authority for approval. A Reference Offer shall be filed not later than thirty (30) working days after being directed to do so by the Authority. 2) A Reference Offer shall adhere to, and incorporate the provisions set forth in this Directive. 3) The Authority shall have not more than twenty (20) working days to review a proposed Reference Offer and decide whether it shall approve it for publication, or intervene to change the terms and conditions of a proposed Reference Offer. If the Authority does not reject the request for approval, or intervene to change the proposed Reference Offer within the twenty (20) working days period, a proposed Reference Offer shall be deemed approved. 4) An approved Reference Offer remains in effect until a modified Reference Offer is approved, unless otherwise determined by the Authority. An approved Reference Offer shall be published on the Authority’s website. 5) A Wholesale Roaming provider with an approved Reference Offer shall file an amended Reference Offer with the Authority for approval not later than seven (7) working days from the date of such amendment. 8