(a) A charge shall be assessed upon all interexchange carriers that are connected to assistance boards through interexchange directory assistance trunks.

(b) Except as provided in § 69.118, if such connections are maintained exclusively by carriers that offer MTS, the projected annual revenue requirement for the Information element shall be divided by 12 to compute the monthly assessment to such carriers.

(c) If such connections are provided to additional carriers, charges shall be established that reflect the relative use of such directory assistance service by such interexchange carriers.