(1) An inspector for the purposes of Part IV of the Principal Act (in this section referred to as an inspector) may, for the purpose of enforcing the provisions of sections 10 and 11 of this Act do all or any of the following things, that is to say -

(a) enter at all reasonable times any premises where he has reasonable grounds for believing that any person affected by a registered employment agreement or fair employment rules works,

(b) require the production of wages sheets or other records of remuneration kept by an employer and inspect and examine those sheets or records and copy any material part thereof,

(c) examine with respect to any matters under section 10 or 11 of this Act or this section any person whom he has reasonable grounds for believing to be or have been a person affected by a registered employment agreement or fair employment rules and require such person to answer such questions (other than questions tending to incriminate such person) as the inspector may put relating to those matters and to sign a declaration of the truth of the answers to the questions.

(2) If a person -

(a) obstructs or impedes an inspector in the exercise of any of the powers conferred on the inspector by this section,

(b) refuses to produce any record which an inspector lawfully requires him to produce,