(1) Telecommunications carriers providing billing services for an operator service provider must disclose on customer bills:

(a) the operator service provider billed amount, clearly distinguished from the carrier's billed amount;

(b) the name of the operator service provider; and

(c) the toll-free telephone number of the operator service provider or the operator service provider's billing agent, if the billing agent has authority to resolve disputes and the operator service provider and billing agent have established an effective method of resolving customer disputes.

(2) Upon request of a customer, the billing telecommunications carrier must provide the exact legal name of the operator service provider, the toll-free telephone number of the operator service provider, the current and complete street address of the operator service provider, and the mailing address of the operator service provider.