Serbian term (edited): organizatori manifestacija i događaja

in this case I don't see the point of splitting hairs - the intention of the lawmaker is that any "event" of any kind will be subjected anyway to the same legal constraints, so there is no point going into subcategories.

[Anyway, it they are doing a serious job with this Draft legislation, they should have a whole section with "definitions of terms" - even within one language not everyone agrees on the meaning of every single term! - end of digression]