Infrastructure sharing arrangements shall be concluded as quickly as possible and in any event, no later than the time limits set out in these regulations, unless otherwise agreed between the parties. 5.2. General Principles The following general principles and guidelines shall apply to the provision of infrastructure sharing services: (a) each licensee has an obligation to treat requests, to negotiate infrastructure sharing agreements and to provide infrastructure sharing services in good faith; (b) consistent with the Law, licensees shall, in the first instance, attempt to reach agreement on infrastructure sharing by negotiation; to pre-empt a failure of such negotiations and to accelerate the conclusion of negotiations, licensees shall follow these guidelines; where there is a dispute, the parties may refer the matter to the Authority for resolution; (c) infrastructure sharing services shall be provided by the infrastructure provider to the infrastructure seeker at reasonable rates, on terms and conditions which are no less favorable than those provided by the infrastructure provider to itself, any nonaffiliated licensee or any subsidiary or affiliate of the infrastructure provider and shall be of no less favorable quality than that provided by the infrastructure provider to itself, any non-affiliated licensee or any subsidiary or affiliate of the infrastructure provider; (d) infrastructure sharing rates shall be determined in a transparent manner; (e) costs and tariffs shall be sufficiently unbundled so that the infrastructure seeker shall be obliged to pay the infrastructure provider only for the network elements or infrastructure sharing services that it requires; (f) costs shall be borne either by the infrastructure seeker or the infrastructure provider or both based on whether their respective requests and compliance with those requests cause those costs to be incurred; and in accordance with an infrastructure sharing agreement between the two parties; (g) infrastructure sharing rates shall be cost-based and shall be set to allow the infrastructure provider to recover a reasonable rate of return on its capital appropriately employed, all attributable operating expenditures, depreciation and a proportionate contribution towards the infrastructure provider's fixed and common costs; 5