Err, probably because civil aviation authorities from around the globe are now trying to inject as many "quality concepts" as possible in their operations ? Traceability, customer service, excellence, reliability, safety, etc. Then it's easier to copy something that's been already done than to reinvent the wheel once again. Considering SA's history and tremendous weight of the British in EU aviation laws, it kinda makes sense to turn to the EASA.
No, I'm not kidding you !
Maybe I should add that it's not because they try that they succeed, but you knew that didn't you ?
