Section 68

requiring ships to which this section applies to carry such number of qualified officers of any description, qualified medical practitioners and qualified cooks and such number of other seaman or qualified seamen of any description as may be specified in the regulations; and

prescribing or enabling the Director to spe-cify standards of competence to be attained and other conditions to be satisfied (subject to any ex-ceptions allowed by or under the regulations) by officers, medical practitioners, cooks and other seamen of any description in order to be qualified for the purposes of this section.

the manner in which the attainment of any standard or the satisfaction of any other condition is to be evidenced;

the conduct of any examinations, the condi-tions for admission to them and the appointment and remuneration of examiners; and

the issue. form and recording of certificates and other docun1ents;

and different provisions may be so made or enabled to be made for different circumstances.

( 5) An officer or seaman shall not be deemed to be qualified for the purposes of this section unless he is the holder for the time being of a valid certificate of competency granted under this section of a grade appropriate to his station in a ship or of a higher grade.

( 6) Regulations under this section may exempt or enable the Director to exempt any ship or description of ships from any requirements of regulations made under this section and any exemption so given may be confined to a particular period or to one or more particular voyages.