Section 8 FSG requires medical fitness for the issue and retention of a driving entitlement. The Health Requirements Regulation specifies which medical circumstances matter for safe driving. In sleep apnoea cases, the actual severity and its effect on daytime alertness are therefore important.
The authority cannot replace the medical question with a general assumption. It may, however, request an examination or report where concrete concerns exist. The trigger can be a medical report, information given in the proceedings, an incident in traffic or an existing condition attached to the entitlement.
For legal review, keep three documents separate: the authority letter with its question, the medical report and the later decision. Their relationship shows whether the request was clear and whether the legal consequence matches the established facts.