(a) An apprentice in a craft or trade may be permitted to work at a wage lower than that established for the journeymen in such craft or trade only if all of the following conditions have been met:
- (1) such apprentice has been individually registered in an apprenticeship program which is duly registered with the industrial commissioner in conformity with the provisions of article twenty-three of this chapter;
- (2) such apprentice's registration occurred prior to his employment as an apprentice on such service work; and
- (3) written proof of such individual registration is submitted to the contracting public agency prior to such apprentice's employment as an apprentice. The proof submitted shall include evidence of the appropriate ratios and apprentice's wage rates.