A bill to amend section 8(b)(4) of the National Labor Relations Act, as amended, with respect to strike at the sites of construction projects.

Provides, that no unfair labor practice, as defined under the National Labor Relations Act, shall be construed to prohibit any strike or refusal to perform services or any inducement of any individual employed by any person to strike or refuse to perform services at the site of the construction, alteration, painting, or repair of a building, and directed at any of several employers who are in the construction industry and are jointly engaged as joint ventures or in the relationship of contractors and subcontractors, and there is a labor dispute, not unlawful under this Act or in violation of an existing collective-bargaining contract, relating to working conditions of employees employed at such site by any of such employers and the issues in the dispute do not involve a labor organization which is representing the employees of an employer at the site who is not engaged primarily in the construction industry.

Requires a labor organization to give ten days notice to specified authorities prior to any such strike at a military installation. (Amends 29 U.S.C. 158 (b))