SPECIAL NUMBERING PROBLEMS
§ 9.51. Addition of new units between existing units.
(a) If it becomes necessary to introduce a new chapter or section between existing chapters or sections the new chapter or section shall be designated by the addition of a letter suffix to the preceding chapter or section number. Thus, a chapter introduced between Chapters 31 and 32 would be numbered Chapter 31a, and a section introduced between § 3.11 and § 3.12 would be numbered § 3.11a. When a number of the chapter or section numbers have been introduced, the entire portion of the title or chapter shall be revised and renumbered.
(b) If it becomes 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 hyphen and Arabic numeral to the letter designating the preceding subsection. Thus, a subsection introduced between subsections (a) and (b) would be numbered as subsection (a-1).
(c) If it becomes necessary to introduce a unit smaller than a subsection between existing units, the entire subsection shall be revised.
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