3. The classes of employees, terms of employment, remuneration or method of remuneration disqualifying a person from participation in the plan are:(1) a person paid in fees or paid by the act;
(2) a person hired to perform duties as a student or a coopérant;
(3) a person hired to perform duties directly related to his training program in a college as student-employee;
(4) a person hired under contract as an independent worker under the terms of whose contract no deduction at source is made;
(5) a resident physician;
(6) a person hired to perform a duty as a trainee, or a person who, under the guidance of a college, university or professional order, is required to complete a training period or clinic to obtain his final degree, except a person belonging to an employment group that provides for a class of trainees.