Every contract-

     (a)     to which a public authority is a party; or

     (b)     which is entered into with the assistance of the Government, whether by way of grant, loan, subsidy, guarantee or similar assistance, or with the sanction of the Government,

and which provides for the employment of persons by one of the parties thereto (other than by the Government or a department of the Government) shall include an express declaration to the effect that every contract of employment entered into pursuant to the contract shall be subject to this Act.

130.   Sanctions available to Government in respect of contracts of employment made pursuant to certain public contracts

            Where an employer who has entered into a contract of employment pursuant to a contract such as is referred to in section 129 to which the Government or a department of the Government is a party contravenes this Act or a term or condition of the contract of employment to the prejudice of the rights of the employee under this Act or the contract of employment, the Government or the department of the Government concerned may withhold from the employer payments due from it under or in connection with the contract or decline to enter into further contracts with the employer until the contravention is remedied.