On any public works to which this Division applies, only competent workmen and apprentices of the trades, crafts, and occupations shall be employed by the contractor and all subcontractors on the public works, provided that the use of apprentices and the ratio of journeymen to apprentices for each craft involved, shall conform to the apprenticeship programs approved by the Bureau of Apprenticeship Training of the U.S. Department of Labor, and as registered with the Maryland Apprenticeship Council, Department of Labor and Industry. Nothing in this Division prevents the employment of laborers to perform work not ordinarily performed by a skilled mechanic or his apprentice of the trade, craft, or occupation, but no person receiving a rate of pay which is the prevailing rate of wages for skilled mechanic or apprentice of such trade, craft, or occupation. Where a laborer performs the work ordinarily performed by any skilled mechanic or his apprentice, he shall be paid for the entire time he has performed such work at the rate of wages applicable to a skilled mechanic; and in the event of such underpayment, restitution shall be made by the contractor to said employee within five (5) working days after notice by the public body or employee, and thereafter, the contractor may be liable to the public body for liquidated damages in an amount not to exceed Ten Dollars ($10.00) per day for each such violation. Each day of violation shall constitute a separate violation.