certain undertakings in the Park to the list of those eligible for streamlined review under section 106 of the Historic Preservation Act of 1966 ( 54 U.S.C. 306108 ). In the development of the Programmatic Agreement, the Secretary shall collaborate with adjacent landowners, Tribes, and other consulting parties. (b) Process for approval After the completion of the Programmatic Agreement under subsection (a), an adjacent landowner shall give the Secretary notice of proposed certain undertakings. Within 30 days of the receipt of the notice, the Secretary shall review and approve the proposed certain undertakings if consistent with the Programmatic Agreement. (c) Definition of certain undertakings As used in this section, the term certain undertakings means those activities that take place on, within, or under a historical crossing and— (1) will last less than 1 month and will have limited physical impact on the surface of the historical crossing