Classes of marine engineer officer certificates
6.—(1)  The following classes of marine engineer officer certificates of competency are to be issued in accordance with these Regulations:
(a)Certificate of Competency (Marine Engineer Officer) Class 1;
(b)Certificate of Competency (Marine Engineer Officer) Class 2;
(c)Certificate of Competency (Marine Engineer Officer) Class 3;
(d)Certificate of Competency (Marine Engineer Officer) Class 4; and
(e)Certificate of Competency (Marine Engineer Officer) Class 5.
(2)  Certificates of competency for all classes are to be issued for motor ships or steam ships or for combined motor and steam ships.
(3)  A certificate of competency of a class set out in paragraph (1) is to be treated as being a certificate of a class higher than a certificate of any class which is set out after it in that paragraph, if the higher class certificate is issued for the same type of ship (whether motor or steam or combined motor and steam) as the lower class certificate.
(4)  A person who is not a qualified marine engineer officer shall not take charge of an engineering watch.