interconnection. (6) Where a licensee seeking interconnection from any interconnection licensee requests that its facilities for interconnection be co-located with the facilities or premises of the interconnection licensee, such co-location may be provided and the costs of such collocation shall be mutually agreed by the parties. 15. Calling line identity. Parties to an interconnecting agreement shall pass calling line identity and all necessary signaling data between interconnecting parties in accordance with standards prescribed and published from time to time by the Commission. 16. Modification, suspension and termination (1) Parties to an interconnection agreement shall ensure that any modification, suspension or termination of the interconnection agreement does not adversely affect customers. (2) An interconnect provider may not terminate an interconnection agreement unless— (a) the termination is as a result of a fundamental breach of the interconnection agreement and the interconnecting licensee after having been given an opportunity to remedy the breach, has failed to do so; (b) the interconnect provider gives reasonable written notice of its intention to terminate and— (i) specifies the grounds for termination; or (ii) gives, in the case of breach, a notice of one month, for the service provider to remedy the breach; (c) the Commission has been notified of the intended termination and it has given consent, in writing. (3) A party to an interconnection agreement may only suspend interconnection in exceptional circumstances and only where such suspension is intended to address a material degradation of telecommunications systems or services and the Commission notified of the intended suspension and it has given its consent.