Employers engaged in SCUBA diving shall comply with the following requirements, unless otherwise specified.
SCUBA diving shall not be conducted:
At depths deeper than 100 fsw or outside the no-decompression limits unless a decompression chamber is ready for use;
Against currents exceeding one (1) knot unless line-tended; or
In enclosed or physically confining spaces unless line-tended.
A standby diver shall be available while a diver is in the water.
A diver shall be line-tended from the surface, or accompanied by another diver in the water in continuous visual contact during the diving operations.
A diver shall be stationed at the underwater point of entry when diving is conducted in enclosed or physically confining spaces.
A diver-carried reserve breathing gas supply shall be provided for each diver consisting of:
An independent reserve cylinder with a separate regulator or connected to the underwater breathing apparatus.
The valve of the reserve breathing gas supply shall be in the closed position prior to the dive.