sentences:  However, in this case the onus is on the diving contractor to ensure acceptable safety during the diving operation based on risk assessment.The level of safety required is specified in the OHS act as "reasonably practicable" taking into account a number of factors, including cost effectiveness, availability of technology for mitigation and available knowledge of hazards.Use of the relatively flexible scientific code rather than the default Code of Practice for Inshore Diving is restricted to clients which are registered as organisations engaged in either scientific research or higher education.