17.—This Act shall not apply to a contract where the employee is—

(a) a member of the Defence Forces,

(b) a trainee within the meaning of the Garda Síochána (Admissions and Appointments) Regulations 1988 (S.I. No. 164 of 1988), or

(c) a nurse in training within the meaning of Parts III and IV of the Nurses Act 1985.