ISE strongly believes that skills and knowledge once learnt, have got to be practiced and applied frequently in order to be kept sharp and up to date. Therefore, any diver who earns any particular certification, has got to be active in order to maintain the ability to dive safely at that level of certification. To prevent divers from jumping back into the sport after a long period of absenteeism, and hurt themselves or others, the ISE certification expires after 3 years. Divers will then have to prove their ability to dive at their highest certified level, to an authorized representative of ISE in order to maintain their status.

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