Oversight and approval for certain building demolition or substantial alteration

(a) Approval of Congress for demolition (1) In general A public building located in the District of Columbia shall not be demolished, in whole or in part, or substantially altered without the express authority of Congress. (2) Requirement As a requirement for a demolition subject to paragraph (1), the site to be demolished shall have an approved and finalized plan for construction. (3) Definitions In this subsection: (A) Public building The term public building means a building, whether for single or multitenant occupancy, and its grounds, approaches, and appurtenances, which is generally suitable for use as office or storage space or both by 1 or more Federal agencies or mixed-ownership Government corporations. (B) Substantial alteration The term substantial alteration means any alteration to a building that— (i) affects structural integrity; (ii) significantly changes historical character; or (iii) exceeds thresholds described in section 3307 of title 40, United States Code. (b) National Capital Planning Commission oversight Section 8722 of title 40, United States Code, is amended— (1) in subsection (b) by inserting, substantial alterations, after proposed developments; (2) in subsection (d), by inserting, architectural integrity, after the location; and (3) by adding at the end the following: (f) Substantial alteration defined In this section, the term substantial alteration means any alteration to a building that— (1) affects structural integrity; (2) significantly changes historical character; or (3) exceeds thresholds described in section 3307..