(a) When a tariff filing is made containing an initial or revised rate, classification, rule, regulation, practice, or condition of service the commission may, either upon written complaint or upon its own motion, after reasonable notice, conduct a hearing to determine the reasonableness and propriety of the filing. Pending a hearing the commission may, by order stating the reasons for its action, suspend the operation of the tariff filing for an initial period not longer than six months beyond the time when it would otherwise go into effect. If good cause is shown, the commission may suspend the operation of the tariff filing for an additional period not to exceed one year following the end of the initial suspension period. If information on which to base a just and reasonable tariff is lacking or incomplete at the close of the second suspension period, the commission may, during the suspension period and for good cause shown, with or without a hearing, order a further suspension and in such instance shall order the filed rate to be collected, subject to refund of the difference between the filed rate and the final rate, until a final rate can be set. The commission may order the difference between the temporary rate established under this section and the filed rate to be placed in escrow or secured by bond pending establishment of the final rate.
(b) An order suspending a tariff filing may be vacated if, after investigation, the commission finds that it is in all respects proper. Otherwise the commission shall hold a hearing on the suspended filing and issue its order, before the end of the suspension period, granting, denying, or modifying the suspended tariff in whole or in part. If an initial tariff is suspended, the commission shall establish a reasonable temporary tariff. The commission may allow the collection of the filed initial tariff, or it may require collection of the temporary tariff. If the commission allows collection of the filed initial tariff, it shall require the pipeline carrier to place the revenue representing the difference between the filed tariff and the temporary tariff in escrow in a financial institution approved by the commission, and keep accurate accounts of all amounts received, specifying by whom and in whose behalf the amounts are paid. At the end or vacation of the suspension period the amount, if any, owing to the pipeline carrier from the difference between the temporary tariff and the permanent tariff shall be paid to the pipeline carrier. The surplus, if any, shall be refunded to the persons in whose behalf the amounts were paid into escrow. Funds may not be released from escrow without the commission's prior written consent and instructions to the escrow agent. The commission may allow the pipeline carrier, at the carrier's expense, to substitute a bond or letter of credit in lieu of the escrow requirement. If the commission requires collection of the temporary tariff, it shall require the shipper to place the revenue representing the difference between the filed initial tariff and the temporary tariff in escrow in a financial institution approved by the commission, and require that accurate accounts similar to those specified above in this section be kept by the carrier and the shipper. The person owing shall pay the person owed to the satisfaction of the commission within 30 days after the commission order allowing or setting a permanent tariff. The amount, if any, by which the permanent tariff exceeds the temporary tariff shall be paid by the shipper to the carrier, or, if the temporary tariff exceeds the permanent tariff, the difference shall be paid by the carrier to the shipper, and in either event such payment shall be made with interest calculated on the balance due at the end of each calendar month at the legal rate, as defined in AS 45.45.010(a). The commission may allow the shipper, at the shipper's expense, to substitute a bond or letter of credit in place of the escrow requirement.
(c) If a proposed increased rate is suspended, the commission shall establish a reasonable temporary tariff. The temporary tariff may be the same as the tariff the carrier is seeking to revise. The commission may allow the collection of the filed proposed increased rate, or it may require collection of the temporary rate. If the commission allows collection of the filed increased rate, it shall require the pipeline carrier to place the revenue representing the difference between the filed proposed increased rate and the temporary rate in escrow in a financial institution approved by the commission, and keep an accurate account of all amounts received, specifying by whom and on whose behalf the amounts are paid. At the end or vacation of the suspension period the amount, if any, owing to the pipeline carrier from the difference between the temporary rate and the permanent rate shall be paid to the pipeline carrier. The surplus, if any, shall be refunded to the persons on whose behalf the amounts were paid into escrow. Funds may not be released from escrow without the commission's prior written consent and instructions to the escrow agent. The commission may allow the pipeline carrier, at the carrier's expense, to substitute a bond or letter of credit in place of the escrow requirement. If the commission requires collection of the temporary rate, it shall require the shipper to place the revenue representing the difference between the proposed increased rate and the temporary rate in escrow in a financial institution approved by the commission, and require that accurate accounts similar to those specified above in this subsection be kept by the carrier and the shipper. The person owing shall pay the person owed to the satisfaction of the commission within 30 days after the commission's order allowing or setting a permanent tariff. The commission may allow the shipper, at the shipper's expense, to substitute a bond or letter of credit instead of meeting the escrow requirement.
(d) One who initiates a change in existing tariffs bears the burden of proving the reasonableness of the change.