Section 5519 - Compliance with workmen's compensation law(a) All contracts executed by the board of commissioners which shall involve the construction or doing of any work involving the employment of labor shall contain a provision that the contractor shall accept, in so far as the work covered by any such contract is concerned, the provisions of the act of June 2, 1915 (P.L. 736, No. 338), known as the "Workers' Compensation Act," and any reenactments, supplements or amendments thereto, and that the said contractor will insure his liability thereunder or file with the board of commissioners a certificate of exemption from insurance from the Department of Labor and Industry of the Commonwealth.(b) The board of commissioners, before signing on behalf of the county any contract, requiring in its performance the employment of labor, shall require proof that the said contractor with whom the contract is made shall have accepted the Workers' Compensation Act and any reenactments, supplements or amendments thereto, and proof that the said contractor has insured his liability thereunder in accordance with the terms of said act or that the contractor has had issued to him a certificate of exemption from insurance from the Department of Labor and Industry.(c) Any contract executed in violation of the provisions of this section shall be null and void.1953, July 28, P.L. 723, art. XXV, § 2519. Amended 2004, Nov. 30, P.L. 1439, No. 186, § 7, effective 1/31/2005.