(a) An incumbent local exchange company may adopt the interconnection rates the commission approves for a larger incumbent local exchange company without additional cost justification.
(b) If an incumbent local exchange company does not adopt the interconnection rates of a larger company or negotiates under Section 60.125(a), the company is governed by Sections 60.125(c)-(f).

(c) If the incumbent local exchange company adopts the interconnection rates of another incumbent local exchange company, the new entrant may adopt those rates as the new entrant’s interconnection rates.
(d) If the incumbent local exchange company elects to file its own tariff, the new entrant must also file its own interconnection tariff.