Okla. Admin. Code § 655:10-3-28
Decimal point numbering may be used when it is necessary to add a Section or Sections between two existing Sections. Use a decimal point followed by an arabic numeral, beginning with the number 1 (e.g., 10:10-3-19, 10:10-3-19.1., 10:10-3-19.2, …10:10-3-20).
Amended at 9 Ok Reg 2983, eff 7-13-92
Amended at 15 Ok Reg 3353, eff 7-15-98