Regulation structure

Title: e.g. 42
- Chapter or Subtitle: e.g. IV
  - Subchapter: e.g. A, C, D: a set of parts.
    - Part: e.g. 433: a set of regulation subparts and sections.
      - Subpart: e.g. "Subpart A": a set of sections.
        
        Subject group: i.e. "Assignment of Rights to Benefits": uncommon, not used in citations.
        
        Section: Usually, but not always underneath a subpart (see 433.1 Definitions).
        
        Paragraph: 433.1(a) 433.1(a)(2).

(For team members: the following diagram file is here.)

Structure of regulations drawio

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