; . (d) Mandatory declarations Section 721(b)(1)(C)(v)(IV) of the Defense Production Act of 1950 ( 50 U.S.C. 4565(b)(1)(C)(v)(IV) ) is amended by adding at the end the following: (hh) Required declarations for certain real estate transactions Notwithstanding item (dd), the parties to a real estate transaction described in subsection (a)(4)(B)(vi) shall submit a declaration described in subclause (I) with respect to the transaction. . (e) Reports required (1) Retroactive applicability Not later than 180 days after the date of the enactment of this Act, the Secretary of the Treasury, in coordination with Secretary of State and the Secretary of Homeland Security, shall submit to Congress a report that includes an assessment of the feasibility of requiring retroactive mitigation measures or divestment of real estate described in clause (vi) of section 721(a)(4)(B) of the Defense Production Act of 1950, as added by this section, that is owned by a foreign entity of concern (as defined in paragraph (7) of section 721(a) of such Act, as amended by this section) that presents a threat to national security (as determined by the Committee on Foreign Investment in the United States). (2) Additional resources Not later than 180 after the date of the enactment of this Act, the Secretary of the Treasury and the Committee on Foreign Investment in the United States shall submit to Congress a report describing any statutory or regulatory changes necessary to carry out this section and the amendments made by this section. (f) Effective date The amendments made by this section shall take effect on the date of the enactment of this Act and apply with respect to any covered transaction the review or investigation of which is initiated under section 721 of the Defense Production Act of 1950 on or after such date of enactment. 3. Report on public or private real estate purchasing activities in the United States by foreign entities of concern (a) Reports (1) In general Not later than 180 days after the date of the enactment of this Act,