Australian Diving Regulations
Work, Health and Safety Act 2011
In Australia the Work Health and Safety Act of 2011 governs industrial safety. The exact rules and regulations are set out in the Work Health and Safety Act Regulation 2017 which can be modified by the relevant state Minister without need for an act of Parliament.
Some activities are regarded as "High Risk" and are dealt with in detail by the Regulations. One of these is Occupational Diving. General diving is dealt with under
Part 4.8 Division 1 to 3. However Division 4 states that any Construction Diving is "High Risk" and must comply with with the Australian Standard AS2299.
All occupational compressed air diving in the Commonwealth of Australia must comply with the Australian Standard AS2299.1.2015 "Occupational Diving".
The standard outlines the number of personnel to be used, the type of    equipment and its maintenance, decompression
      procedures, and the paperwork to be kept.
      The standard requires that the Diving Team be composed of four people    whose roles are as follow:
  
  The Supervisor - whose duty is to ensure that all diving is    carried out in compliance with the standard
  
  The Diver - who enters the water and perform as the task.
  
  The Stand By Diver - who shall be ready to assist the diver is    necessary
  
  The Attendant - who is a general hand to assist the diver and    handle the hoses.
      In practise, the dive team usually is composed of three persons, with    the Supervisor acting as
      the Attendant, when the water depth is less than 20 metres deep. 
      There are three types of Compressed Air Diving covered by AS2299:
  
      1. SCUBA (Self Contained Underwater Breathing    Apparatus
      2. SSBA - Surface Supplied Breathing Apparatus
      3.SRD - Surface Recompression Diving
  
  SCUBA is diving with your air supply on your back. Use is limited    under AS2299 to
      operations not involving cranes, power tools, limited surface access,    prolonged exertion or
      depths in excess of 30 metres. The reason for this is the limited air supply.    SCUBA is
      ideally suited to inspection dives, scientific research on marine life,    underwater photography.
  
  SSBA is the usual choice for Commercial Diving because the Diver    has an unlimited air
      supply from the surface compressor and or bottled air via his air hose.
  
  SRD involves the Diver carrying out his decompression in a    Recompression Chamber on the Surface. SRD allows the surface team greater    control over the decompression of the diver because of the controlled environment the chamber creates.
    
    
Diver Training and Certification
In Australia the Commonwealth Government controls the regulation of    Commercial Diving through the Australian Diver Accreditation scheme    (ADAS). 
      All divers working as an    occupation other than self employed abalone divers must have an ADAS    certification. There are four ADAS certification levels:
  
  Level One - SCUBA Diving without tools
  Level Two - Surface Supplied Diving 
  Level Three - Surface Recompression Diving on Air
  Level Four - Mixed Gas Diving
    
    
The training requirements for ADAS certification are laid down in Australian Standard 2815 parts 1 to 4. In order to meet the training criteria the would-be diver must attend an accredited Diver Training school.
