; and (4) by adding at the end the following new paragraphs: (2) Applications to amend If the Commission issues a construction authorization for a repository pursuant to paragraph (1) and the Secretary submits an application to amend such authorization, the Commission shall consider the application to amend using expedited, informal procedures, including discovery procedures that minimize the burden on the parties to produce documents. The Commission shall issue a final decision on such application to amend within 1 year after the date of submission of such application, except that the Commission may extend such deadline by not more than 6 months if, not less than 30 days before such deadline, the Commission complies with the reporting requirements established in subsection (e)(2). (3) Infrastructure activities (A) In general At any time before or after the Commission issues a final decision approving or disapproving the issuance of a construction authorization for a repository pursuant to paragraph (1), the Secretary may undertake infrastructure activities that the Secretary considers necessary or appropriate to support construction or operation of a repository at the Yucca Mountain site or transportation to such site of spent nuclear fuel and high-level radioactive waste. Infrastructure activities include safety upgrades, site preparation, the construction of a rail line to connect the Yucca Mountain site with the national rail network (including any facilities to facilitate rail operations), and construction, upgrade, acquisition, or operation of electrical grids or facilities, other utilities, communication facilities, access roads, and nonnuclear support facilities. (B) Environmental analysis If the Secretary determines that an environmental analysis is required under the National Environmental Policy Act of 1969 with respect to an infrastructure activity undertaken under this paragraph, the Secretary need not consider alternative actions or a no-action alternative. To the extent any other Federal agency