Never curse the Fairy Queen and/or her government because they will return it with bells on. They believe in paying back with (compound) interest.
You will not raid the Queen’s private magical library.
The Librarian has been known to date-stamp, with some brutality, areas of invaders generally considered to be personal so unless you like that kind of thing, think again.
You will read other planets’ version of our fairy tales as well as our direct versions.
There is truth in all fairy tales
You will use magical equipment for the purpose for which it was intended, unless there is a desperate battle against all things evil going on.
In that circumstance only can you use crystal balls in particular as offensive weapons to be dropped on heads etc.
You will enscribe your spells in the proper manner with all ingredients listed, easily and renewably sourced, and with the method thoroughly explained.
You will not make your spell sound like a recipe. You will use plenty of Latin to give your spell the proper gravitas. We are performing magic here, people. We will take it seriously.
You will practice the specific magical talent granted to your particular species on a day and time laid down by your group’s leaders.
Twice a year the magical groups will hold a gathering where the Queen and her Council can see that this practice is clearly being carried out.
You will not use magic for fighting unless the Kingdom is at war.
If there are disputes between groups, these should be resolved by discussion overseen by the Queen and her Council. Nobody wants a return to the land being made barren by having too much magic thrown at it, do they?
Do not inflict magic upon others unless you are prepared for them or their kind to do the same or worse to you.
And they will.
Do not betray the existence of the Fairy Kingdom.
You know what humans are like for colonizing other places. We do not want that to happen here. They will only try to harnass magical power for their own uses. And that scene would end in tears.
You will revise your specialist magic at least once a day.
Never forget! Your life will depend on how thorough you are with this.