Okla. Admin. Code § 365:25-7-22
Unless the context otherwise requires, terms found in this section and in Section 1631 of the Act are used as defined in the said Section 1631. Other nomenclature or terminology is according to the Insurance Code, or industry usage if not defined by the Code. In addition, the following words or terms, when used in this part, shall have the following meaning, unless the context clearly indicates otherwise:
"Act" means the Insurance Holding Company System Regulatory Act, 36 O.S. § 1631, et seq.
"Executive officer" means chief executive officer, chief operating officer, chief financial officer, treasurer, secretary, controller, and any other individual performing functions corresponding to those performed by the foregoing officers under whatever title.
"Foreign insurer" means an alien insurer except where clearly noted otherwise.
"Ultimate controlling person" means that person which is not controlled by any other person.
Okla. Admin. Code § 365:25-7-22