Okla. Stat. tit. 59, § 59-1150.12: Use of title and abbreviation R.P.S. or R.P.E.S

Only a person who has qualified as a registered sanitarian or

environmental specialist and who holds a valid current registration

certificate for use in this state shall have the right and privilege

of using the title Registered Professional Sanitarian or Registered

Professional Environmental Specialist and to use the abbreviation

R.P.S. or R.P.E.S. after the name of such person. Any person who

violates the provisions of this section, upon conviction thereof,

shall be guilty of a misdemeanor.