Section 28(2)(a) in The Contract Labour (Regulation and Abolition) Act, 1970
(a)enter, at all reasonable hours, with such assistance (if any), being persons in the service of the Government or any local or other public authority as he thinks fit, any premises or place where contract labour is employed, for the purpose of examining any register or record or notices required to be kept or exhibited by or under this Act or rules made thereunder, and require the production thereof for inspection;