010 Air Law topic guide
Licences, Ratings and Medical Validity
A pilot licence, on its own, authorises nothing. It only becomes useful in combination with a current rating that matches the aircraft and the operation, and a medical certificate of the class the operation requires, both valid at the moment those privileges are exercised. The exam treats this as one interlocking system: give it a scenario and it wants all three layers checked, not just the one the stem seems to be asking about.
The two areas that generate the most dropped marks are matching the correct class of medical certificate to the licence and activity in question, and telling revalidation and renewal apart. Both hinge on the same underlying idea, that a certificate or rating has a defined period of validity, and that what happens on either side of its expiry date is governed by genuinely different rules.
How licence, rating and medical interlock
Holding a commercial pilot licence does not by itself allow commercial operation of a specific aircraft. That requires a matching type or class rating that is current, and a medical certificate of the required class that is also current at the time the privilege is exercised. Ratings carry their own currency requirements, separate from the medical, so an otherwise valid licence and a valid medical can still be grounded by a rating that has quietly lapsed.
This is why exam scenarios often give three separate dates, one for the licence itself, one for a rating, and one for the medical, and ask whether the pilot may legally exercise a specific privilege on a given day. The correct method is to check every layer independently rather than assuming that a valid medical or a valid licence implies the others are also in date.
Matching the medical class to the activity
A Class 1 medical certificate is required to exercise the privileges of a commercial pilot licence, an airline transport pilot licence, or a multi-crew pilot licence. A Class 2 medical certificate supports private pilot licence privileges instead, and the two are not interchangeable upward: a Class 2 certificate does not cover commercial flying, even briefly.
Validity of a Class 1 certificate is commonly examined as running for twelve months, with reduced validity applying from defined age thresholds onward. Because the exact age bands and reduced periods vary by rule set and by the type of operation, treat any specific number in a stem with care rather than assuming a single duration applies everywhere, and focus instead on the underlying idea that validity shortens as the holder gets older.
Revalidation versus renewal
Revalidating a rating or medical before it expires extends the new period of validity from the original expiry date, preserving continuity, so the new period is added onto the old one rather than starting fresh from the day of the check. Renewal, carried out after the certificate or rating has already lapsed, requires meeting the full requirement again, and the new validity begins only from the date the renewal requirement is actually completed, which can leave a real gap during which the privilege did not legally exist.
The exam frequently describes a pilot who let a rating or medical lapse and then completed the necessary check some time later, and asks from which date the new validity runs. The method is always the same: confirm whether the check happened before or after the old expiry date, because that single fact decides which of the two rules applies.
Worked example
Worked example: revalidation or renewal
Not quite. The correct answer is B.
Correct answer: B
- A. Extending from the original expiry date is how revalidation works when the check is completed before expiry. Once the rating has already lapsed, that continuity is lost.
- B. Correct. Because the rating had already lapsed, this is a renewal, and renewal starts the new validity from the date the requirement is actually met.
- C. The application date carries no validity meaning. Only satisfying the actual requirement, passing the check, starts the new period.
- D. Ratings and medicals are never backdated to erase a lapse. The four months during which the rating was not current are simply a period during which its privileges did not exist.
Step by step
- Establish the timeline: the rating lapsed four months ago and has only now been brought current by completing the required check, well after expiry.
- Recall the rule that separates the two paths: revalidation before expiry runs the new period from the old expiry date; renewal after expiry runs it from the date the requirement is actually met.
- Since the rating had already lapsed, this is a renewal, not a revalidation.
- The new validity therefore starts from the day the proficiency check was completed, with the four lapsed months simply lost, not recovered.
Common mistakes
Treating every currency check as a revalidation
Once a rating or medical has actually expired, completing the same check afterwards is a renewal with a different start date for the new validity, and the exam plants this exact distinction as a distractor pair.
Assuming a Class 2 medical covers commercial privileges
Class 2 supports private flying only. Any commercial, ATPL or MPL privilege needs a Class 1 medical current at the time it is exercised, and mixing the two loses an easy definitional mark.
Assuming a valid medical is enough on its own
A current medical does not restore a lapsed rating or an expired licence. The exam expects licence, rating and medical to be checked independently before concluding a pilot may legally exercise a given privilege.
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Important information
This page is general educational information for student pilots and may be out of date.
Aviation rules, training requirements, costs, medical standards, and exam details change over time and vary by country, authority, and training organisation, so details here may no longer be current or may differ in your case.
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Last reviewed July 2026