(a) Savings clause
Nothing in this chapter affects—

(1) any decision, certificate, permit, right-of-way, lease, or other authorization issued under section 9 of the Alaska Natural Gas Transportation Act of 1976 (15 U.S.C. 719g); or

(2) any Presidential finding or waiver issued in accordance with that Act [15 U.S.C. 719 et seq.].

(b) Clarification of authority to amend terms and conditions to meet current project requirements
Any Federal agency responsible for granting or issuing any certificate, permit, right-of-way, lease, or other authorization under section 9 of the Alaska Natural Gas Transportation Act of 1976 (15 U.S.C. 719g) may add to, amend, or rescind any term or condition included in the certificate, permit, right-of-way, lease, or other authorization to meet current project requirements (including the physical design, facilities, and tariff specifications), if the addition, amendment, or rescission—

(1) would not compel any change in the basic nature and general route of the Alaska natural gas transportation system as designated and described in section 2 of the President's decision; or

(2) would not otherwise prevent or impair in any significant respect the expeditious construction and initial operation of the Alaska natural gas transportation system.

(c) Updated environmental reviews
The Secretary shall require the sponsor of the Alaska natural gas transportation system to submit such updated environmental data, reports, permits, and impact analyses as the Secretary determines are necessary to develop detailed terms, conditions, and compliance plans required by section 5 of the President's decision.