(a) A telecommunications carrier that provides telephone exchange service shall provide subscriber list information gathered in its capacity as a provider of such service on a timely and unbundled basis, under nondiscriminatory and reasonable rates, terms, and conditions, to any person upon request for the purpose of publishing directories in any format.

(b) The obligation under paragraph (a) to provide a particular telephone subscriber's subscriber list information extends only to the carrier that provides that subscriber with telephone exchange service.