Okla. Admin. Code § 140:15-7-4
(a) Every chiropractic physician who writes or prints, or causes to be written or printed, his or her name (whether or not the word "doctor," or an abbreviation thereof, is used in conjunction therewith) in any manner in connection with such person engaging in, or in any manner holding himself or herself out to the public as engaging in, the practice of chiropractic, shall append to his or her name so written or printed, in the same size letter as his or her name, one of the following designations:
Added at 11 Ok Reg 4573, eff 8-25-94
Amended at 35 Ok Reg 907, eff 9-14-18
Amended at 41 Ok Reg, Number 22, effective 8-11-24