Can an Earth leakage be used as a main switch ?

[Steven@platinum.co.za]

Hi guys, I hope you are well.

I would like to find out if the following would be considered compliant.

A CoC was recently issued on a property where there is no separate main circuit breaker on the DB board, the earth leakage is being used as both the main switch & earth leakage.

There is only one DB board on the property which is fed directly from the Eskom box on the side of the road, there is no inline circuit breaker between the Eskom box and DB board. Based on this there is no way to isolate the DB as the Eskom box is locked.

Would this be considered compliant ?

I have attached a photo of the DB board as reference.

Thanks in advance for any assistance.