I looked at the syllabus (woodwind, recorder and brass) for my local festival - one I played in many many years ago in recorder ensemble. There are no fixed pieces to play, they are all free choice

There are various age classes:
- 10 and under, 12 and under, 14 and under - there are three classes in each age group (one for each of woodwind, recorder and brass).
- 17 years and under solo - one class for all three
- 14 and under junior recital, 17 years and under senior recital - again these two are just one class each, but in the notes it is noted that these are intended for more advanced players. So if you are a 'lower grade' 16 year old you would go in 17 years and under solo [solo doesn't mean unaccompanied here!]; but a 'higer grade' 16 year old could go in the 17 years and under senior recital. The difference is in the former you'd just be up against the same instrument 'type' as yourself (i.e. woodwind or recorder or brass), whereas in the higher the other people in the class could be any of the three.
There are also two classes exclusively for adults.
Adult intermediate - beginner to G5
Adult advanced - G5-7
Again, here it is mixed recorder/woodwind/brass.
Finally there is 'Open diploma', which is 12 minutes, any age, woodwind or brass or recorder, which must be one 'substantial item'.
:pout: there are special prizes for woodwind and brass, but not for recorder...