At present Compass should only be used to record adults (ie people over 18).
The only reason for adding somone who is not yet 18 to Compass is to start the application for a disclosure check. (This may be necessary for example when they are planning to go to camp on / shortly after their 18th birthday.)
Once an under 18 year old has been added to Compass it is essential that a disclosure application is made without delay. The disclosure compliance procedures starts from the date they are added to Compass (even if a later start date is entered) and so the individual will only have 30 days (60 days where a paper application is required) before they become liable for suspension. (See this FAQ for more details)