(1) The holder of a medical certificate shall—
(a) carry such medical certificate on his or her person when carrying out the duties as a flight crew member, an air traffic service personnel member or a cabin crew member, as the case may be;
(b) not under any circumstances act as a PIC, or in any other capacity as a flight crew member, an air traffic service personnel member or a cabin crew member, as the case may be—
(i) while he or she is aware of any medical condition or medication which could affect the validity of such medical certificate;
(ii) while she is pregnant during periods and under circumstances as prescribed in Document SA-CATS 67;
(iii) if the holder has given birth in the preceding six weeks; or
(iv) after such medical certificate has expired;
(c) without undue delay, notify the designated body or institution of any—
(i) injury;
(ii) hospitalisation;
(iii) surgical operation or invasive procedure;
(iv) regular use of medication;
(v) pregnancy;
(vi) absence due to illness for a period of more than 21 days; or
(vii) psychiatric treatment, which renders such holder unable to comply with the appropriate medical requirements and standards referred to in regulation 67.00.2 (6).
(2) For the purposes of sub-regulation (1) (c), the holder of a medical certificate shall, before such holder resumes the exercising of the privileges of the licence held by him or her, furnish the designated body or institution with proof that he or she has fully recovered from the decrease in medical fitness.
(3) The holder of a Class 4 medical certificate shall, after the medical certificate has been issued to him or her, on an annual basis complete and submit to the designated body or institution the medical declaration as prescribed in Document SA-CATS 67.
(4) No flight crew member shall—
(a) consume any alcohol less than 8 hours prior to the specified reporting time for operational duty or the commencement of a shift;
(b) commence an operational duty while the concentration of alcohol in any specimen of blood taken from any part of his or her body is more than 0,02 gram per 100 millilitres;
(c) consume alcohol during the operational duty period or whilst on standby for operational duty; and
(d) commence an operational duty period while under the influence of liquor or any drug having a narcotic effect.
(5) Flight crew members shall not—
(a) exercise the privileges of their licences and related ratings while under the influence of any psychoactive substance which might render them unable to safely and properly exercise these privileges; and
(b) engage in any problematic use of substances.