SPECIAL NUMBERING PROBLEMS
§ 23.31. Addition of new units between existing units.
(a) Chapters.—If it becomes necessary to introduce a new chapter between existing chapters the new chapter shall be designated by the addition of a letter suffix to the preceding chapter number. Thus, a chapter introduced between Chapters 31 and 32 would be numbered Chapter 31A. This practice should be avoided whenever possible since it results in extremely awkward section numbering. For example, the first section in Chapter 31A would be numbered § 31A01.
(b) Sections.—If it becomes necessary to introduce a new section between existing sections the new section shall be designated by the addition of a period and Arabic numeral suffix to the preceding section number. Thus, a section introduced between § 311 and § 312 would be numbered § 311.1. When a number of such section numbers have been introduced the entire portion of the title or chapter should be revised and renumbered.
(c) Subsections.—If it should become necessary to introduce a subsection between existing subsections, and revision of the entire section is not desirable, the new subsection shall be designated by the addition of a period and Arabic numeral suffix to the letter designating the preceding subsection. Thus, a subsection introduced between subsections (a) and (b) would be numbered as subsection (a.1).
(d) Smaller units.—Should it become necessary to introduce a unit smaller than a subsection between existing units, the entire subsection or appropriate minor subdivision should be revised. If this is not feasible, the numbering scheme applicable to subsections is to be used.
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