Section 45(2)(b) in The Employees' State Insurance Act, 1948
(b)at any reasonable time enter any office, establishment, factory or other premises occupied by such principal or immediate employer and require any person found in charge thereof to produce to such Social Security Officer or other official and allow him to examine such accounts, books and other documents relating to the employment of persons and payment of wages or to furnish to him such information as he may consider necessary; or