manner— (a) access to network facilities shall be commercially agreed upon between the facilities acquirer and the facilities licensee; (b) request for access to network facilities shall be reasonable and in writing; (c) a facilities licensee and a facilities acquirer shall negotiate access to network facilities, at all times, in good faith; (d) a facilities licensee shall submit a copy of a concluded access agreement to the Commission within thirty days after the conclusion; (e) the Commission may authorize access to essential facilities of dominant telecommunications service providers; and (f) a facilities licensee who has been authorized to provide access to network facilities shall be entitled to levy a charge for such access to enable it recover economic costs and ensure a reasonable rate of return; (2) A facilities provider shall treat each— (a) facilities acquirer on a basis that is non-discriminatory in its provision of facilities and no less favourable than the treatment which the facilities provider affords to its subsidiaries, its affiliates, or other similarly situated facilities acquirers; (c) communication network service of a facilities acquirer on a basis that is nondiscriminatory and no less favourable than the treatment which the facilities provider affords to the electronic communication network services of itself, its affiliates, or other similarly situated facilities acquirers; and (d) customer of a facilities acquirer on a basis that is nondiscriminatory and not less favourable than the treatment which the facilities provider affords to its own customers of the customers of its subsidiaries, its affiliates, or other similarly situated facilities acquirers. (3) A facilities licensee may refuse unreasonable requests for access to its network facilities. (4) A request for access to network facilities shall be unreasonable if it—