3.1. The holder of a Class D diver certificate may
(1) make recreational underwater dives using compressed breathing gas in the same conditions as a Class C diver; and
(2) in accordance with the standards set by the holder’s diving association listed in Schedule 7, assist an instructor in his or her duties of teaching diving, among others, during practical tests required to obtain diver qualification.
The activities referred to in subparagraph 2 may be carried out by a Class D diver only with students who are already under the responsibility of an instructor and under the instructor’s direct supervision. A diver is not authorized to assess a student or to be responsible for a group of students.