Definition
Having the force of law; established by an official authority such as the FAA and legally binding on pilots, operators, and aircraft. Regulatory material must be complied with, and non-compliance can result in enforcement action, including certificate suspension or revocation.
Plain English
If something is regulatory, it's a rule you must follow by law — not a suggestion or a recommendation.
Context Anchor
Seen in FAA handbooks, charts, airspace discussions, and operating rules when the text is describing what is required rather than what is simply recommended.
Derivation
From Latin 'regula' meaning 'rule' or 'straight stick used for measuring.' Regulatory material is, literally, the set of rules you must measure your actions against.
Why Pilots Care
Determines whether violations carry legal penalties and whether prior authorization or strict compliance is required.
Intuition Check
Regulatory does not mean merely official-looking or helpful. In aviation, regulatory means connected to rules or requirements that must be followed.
Example Sentence 1
Title 14 of the Code of Federal Regulations (14 CFR) is regulatory and must be followed by all certificated pilots.
Example Sentence 2
The regulatory requirement for a current medical certificate must be met before acting as pilot in command.