It all depends.
If you are already licensed in another IHSA sport, all you have to do is pay the fee for the new sport and you will be licensed when you pass the Part 1 Exam and go to a Rules Meeting.
If you are not licensed then you have to go through the application process. Which you have to get personal references through either officials or IHSA school members to get the opportunity to get a license with the IHSA. You would also have to give some information for a background check.
I would contact the IHSA at
www.ihsa.org. Go they will give you all the appropriate information.
Peace