; or (ii) refuses to become a signatory, or otherwise adhere to, an agreement with 1 or more labor organizations with respect to that construction project or another related construction project. (2) Application of prohibition This subsection shall apply with respect to— (A) contracts entered into on or after the date of the enactment of this Act; and (B) subcontracts awarded under such contracts. (3) Rule of construction Nothing in paragraph (1) may be construed to prohibit a contractor or subcontractor from voluntarily entering into an agreement described in such paragraph. (4) Federal Acquisition Regulation With respect to Federal contracts to which this subsection applies, not later than 60 days after the date of the enactment of this Act, the Federal Acquisition Regulation shall be revised to implement the provisions of this subsection. (b) Recipients of grants and other assistance The head of each executive agency that awards grants, provides financial assistance, or enters into cooperative agreements for construction projects after the date of the enactment of this Act shall ensure that— (1) the bid specifications, project agreements, or other controlling documents for such construction projects of a recipient of a grant or financial assistance, or by the parties to a cooperative agreement, do not contain any of the requirements or prohibitions described in subparagraph (A) or (B) of subsection (a)(1)