Regulatory Framework
How Indian civil aviation regulation is layered
A candidate must be able to place any requirement into its correct layer. At the top sit the Convention on International Civil Aviation (Chicago Convention, 1944) and its Annexes, which are standards and recommended practices (SARPs) issued by ICAO. Annexes are not self-executing: each State adopts them into national law. In India, the enabling statute is the Aircraft Act, 1934, under which the Central Government makes the Aircraft Rules, 1937. The Directorate General of Civil Aviation (DGCA) then issues Civil Aviation Requirements (CARs) as subordinate technical requirements, organised into Sections and Series (for example CAR Section 2, Series M for continuing airworthiness, and CAR Section 2, Series F for approved organisations).
Learn the difference between a Rule, a CAR, and an Advisory Circular. A CAR is mandatory unless it explicitly says otherwise; guidance material and Acceptable Means of Compliance (AMC) explain how to comply but do not override the requirement. A common trap is assuming an ICAO Annex applies directly to an engineer or an organisation. It does not - only the national rule and the CAR do, though the CAR is usually harmonised with the Annex.
Worked example / rule of thumb
If a question asks "which document legally obliges an Indian AMO to have a quality system?", the chain is: Aircraft Rules 1937 (empowerment) → CAR Section 2 Series F (requirement) → organisation exposition (implementation). Answer with the CAR, not the Annex.
Rule of thumb: Annex = international standard; Rule = national law; CAR = national technical requirement; Exposition = your own procedure.