3.05.07. In the practice of his profession, or in anticipation of that practice, a hearing-aid acoustician may not enter into a contract that would limit or control the manner in which he runs his consulting-room or practises his profession. Thus he must never contract to:(a) limit or control his office hours;
(b) use a form of advertising contrary to the Professional Code (chapter C-26), the Hearing-aid Acousticians Act (chapter A-33) or any regulation pursuant thereto;
(c) exclude certain types or brands of hearing-aid from those he offers to the public;
(d) limit his freedom to buy and sell;
(e) determine or restrict the professional services he may offer the public.