(a) A public agency may, without consultation or approval by the Administrator, institute a decrease in the level of PFC to be collected from each passenger, institute a decrease in the total PFC revenue, or an increase in the total approved PFC revenue of 15 percent or less. The public agency shall notify the collecting carriers and the FAA in writing of these changes. Any new charge will be effective on the first day of a month which is at least 60 days from the time the public agency notifies the carriers.

(b) Subject to paragraph (b)(1) or (b)(2) of this section, an approved PFC may be amended to increase the level of PFC to be collected from each passenger, increase the total approved PFC revenue by more than 15 percent, materially alter the scope of an approved project, establish a new class of carriers under §158.11 or amend any such class previously approved. The public agency must submit to the Administrator a notification of any proposal to institute such an amendment. Such notification shall include written evidence of further consultation with and agreement or disagreement by the air carriers and foreign air carriers operating at the airport, justification for the amendment, and such other information as may be requested by the Administrator.

(1) With the exception of a change in PFC level to more than $3 or an amendment of a PFC that is subject to a competition plan under §158.19, in the event of no carrier disagreement with a change proposed under this paragraph (b), the public agency may institute the proposed amendment unless, within 30 days after providing the notification required under this paragraph (b), it is notified otherwise by the Administrator.

(i) If a PFC level of more than $3 is requested, the Administrator notifies the public agency that the conditions of §158.17 have been met before the higher level can be instituted.

(ii) If a PFC amendment that is subject to the competition plan requirement is submitted, the Administrator notifies the public agency that the plan satisfies the requirements of §158.19.

(iii) The public agency shall notify the carriers of the effective date of any change to the approved PFC resulting from the amendment, subject to the limitation that the effective date of any new charge shall be no earlier than the first day of a month which is at least 60 days from the time the public agency notifies the carriers.

(2) In the event of any carrier disagreement with a change proposed under paragraph (b) of this section, the public agency shall submit a request to the Administrator that the proposed amendment be approved. In addition to the notification and written evidence required under that paragraph, the public agency shall submit the reasons presented by the carriers for disagreeing with the proposed amendment, its reasons for requesting the amendment in the face of such disagreement, and such other information as may be requested by the Administrator. The Administrator reviews and approves or disapproves the amendment within 120 days of receipt of the request following such consultation, public notice and opportunity for comment as the Administrator may deem appropriate. If the amendment is approved, the Administrator advises the public agency and notification to the carriers will be as provided under paragraph (b)(1) of this section. If a PFC level of more than $3 is requested, the Administrator must find that the conditions of §158.17, and §158.19 if applicable, have been met before that PFC level can be instituted. If the amendment is approved, the Administrator advises the public agency and notification to the carriers will be as provided under paragraph (b)(1) of this section. The notification to the carrier includes any findings required by §158.17 or §158.19.