Okla. Stat. tit. 12 § 2002 : — Civil ProcedureOklahoma Pleading Code — Civil Action TEXT PDF There shall be one form of action to be known as "civil action". Okla. Stat. tit. 12, § 2002 Added by Laws 1984, SB 417, c. 164, § 2, eff. 11/1/1984.