Whatever the level of competition, the presence of an official is always recommended. The role of the official is not to simply enforce the rules. Rather, it is to ensure that competitions are run smoothly so competitors can focus on performance since the conditions of every competition are the same for all athletes each and every time.
Instead of being autocratic, an official explains the rules clearly and unambiguously to coaches and athletes by drawing from their breadth of experience and knowledge.
If you are already an official make sure you are registered with the SFC to stay informed of the latest developments. You can also register here.