Information—general duty
4. Subject to Regulation 8 below, it shall be the duty of any person whom an inspector has reasonable cause to believe to be able to give to an inspector any information relevant to the execution of Part III of the Act to do such of the following things as an inspector may require, that is to say:—
(a)answer (in the absence of persons other than a person nominated by him to be present and any persons whom the inspector may allow to be present) such questions as the inspector may think fit to ask;
(b)furnish in writing such of that information as he has or can reasonably obtain.