(4) Parties to an interconnection agreement that has been approved by the Commission may amend or modify the agreement by giving the Commission a copy of the proposed amendment not less than fourteen days prior to the effective date. 17. Confidentiality (1) A party who receives information relating to interconnection from another party which is designated as confidential shall keep the information confidential and may disclose it— (a) to employees, agents or advisers who need to know that information for the purpose of the provision of interconnection, or giving advise thereon; (b) to persons to whom such disclosure is authorised by that other party; (c) where such disclosure is authorized or required by law; and (d) to the Commission. (2) Confidential information relating to interconnection of a party received by another party, or business information generated by the telecommunications system of a party as a result of interconnection, shall be used solely for the purpose of providing interconnection, and shall not be disclosed to any person involved in the development or provision of retail services of the other party, its subsidiaries or affiliates. (3) The provisions relating to confidentiality of any matter in an interconnection agreement shall not prevent the disclosure by the Commission of any provisions therein due to public interest or pursuant to a legal process. 18. Reference interconnection offer and reference access offer obligations. (1) Where the Commission issues an order requiring a dominant telecommunications service licensee to publish a reference interconnection offer or a reference access offer, the licensee shall, unless otherwise determined by the Commission— (a) submit a proposed reference interconnection or reference access offer, as the case may be, to the Commission for review and approval within three months after the issuance