Section 64.2333 - Burden of proof(a) In any future proceeding arising under section 222(e) of the Communications Act or § 64.2309 , the burden of proof will be on the carrier to the extent it claims its internal subscriber list information systems cannot accommodate the delivery time, delivery schedule, unbundling level, or format requested by a directory publisher.(b) In any future proceeding arising under section 222(e) of the Communications Act or § 64.2309 , the burden of proof will be on the carrier to the extent it seeks a rate exceeding $0.04 per listing for base file subscriber list information or $0.06 per listing for updated subscriber list information.