Section 21

to enter and inspect any premises which are used or proposed to be used, or in respect of which there is reasonable cause to believe that they are being used, for the testing of sight and the prescription and fitting of contact lenses;

to inquire into and to report to the Board the conditions under which the testing of sight and the prescription and fitting of contact lenses are being or are proposed to be carried out by any person;

to observe the conduct of any course of instruction or examination approved under section 7(3); and

to enter and inspect any premises where any course of instruction approved under section 7(3) is or is proposed to be conducted.