31.02.2006 as is seen from the contract Ex.A1. Subsequently, it was extended till 31.05.2006 (Ex.A6). As per the terms of the contract a sum of Rs.92,400/- was paid by the plaintiff towards security deposit. It is admitted that some of the labourers raised a dispute before the Assistant Commissioner of Labour, Chennai, claiming payment of bonus to them. According to the first defendant, they deposited a sum of Rs.75,294/- to the Assistant Commissioner of Labour and therefore, they are not in a position to refund Rs.92,400/- to the plaintiff. In the written statement, there is no specific plea that a sum of Rs.75,294/- was deposited by the first defendant with the Assistant Commissioner of Labour, Chennai. However, Mr.J.Deliban, learned counsel for the appellant contended that subsequent to the filing of the written statement, they were asked to deposit a sum of Rs.75,294/- by the Assistant Commissioner of Labour. As per the Contract Labour (Regulation and Abolition) Act, 1970, the first defendant is the principal employer. Under Section 21(4) of the Act, if the contractor fails to make payment of wages within the prescribed period or make short payment, the first defendant as a principal employer is entitled to recover from the contractor or deduct the amount if any with