In addition to the obligations placed on all public network operators set out in regulation 5, a dominant fixed public network operator shall—
(a) provide joining services to any other public network operator that requests the joining services;
(b) provide usage-based transit services to other public network operators that request the usage-based transit services;
(c) where it provides broadband Internet access as a retail service, it shall arrange to carry the broadband information to unaffiliated Internet service providers of the end user customer's choice.