RTC members have agreed to comply with the ISO Standards for rebreather diver training. The following ISO Standards have been published to date:

ISO 24804 “Recreational diving services — Requirements for rebreather diver training — No- decompression diving”

A diver able to make dives with a rebreather not requiring mandatory decompression stops using a nitrox or air diluent to a maximum of 30 metres 

ISO 24805 “Recreational diving services — Requirements for rebreather diver training — Decompression diving to 45 m”

A diver able to make dives with a rebreather requiring mandatory decompression stops using a nitrox or air diluent to 40 metres or to 45 metres with trimix diluent 

ISO 24806 “Recreational diving services — Requirements for rebreather diver training— Decompression diving to 60 m” 

A diver able to make dives with a rebreather requiring mandatory decompression stops to a maximum depth of 60 metres using bailout gas mixtures that are not hypoxic at surface pressures

ISO 24807 “Recreational diving services — Requirements for rebreather diver training— Decompression diving to 100 m” 

A diver able to make dives with a rebreather requiring mandatory decompression stops to depths of 100 metres or beyond using any gas mixtures

ISO Standards can be purchased from any National Standards Body that is a member of ISO. These can be viewed here: https://www.iso.org/