Okla. Admin. Code § 710:40-1-2
The following words and terms, when used in this Chapter, shall have the following meaning, unless the context clearly indicates otherwise:
"Affiliated corporations" means those entities authorized or required to file a consolidated Federal Income Tax Return by the applicable provisions of the Internal Revenue Code, as amended, and regulations promulgated pursuant to such code.
"Business situs" means the location at which a reporting entity exercises control over an intangible asset. For purposes of this Chapter, a branch location shall not be considered to be the business situs for an intangible asset unless the asset is managed, directed and controlled from that location.
"Current liability" means any bond, note, debenture, or other evidences of indebtedness, or any portion thereof, payable within three (3) years or less after issuance. Current liability shall not include that portion of a debt which matures more than three (3) years after issuance.
Okla. Admin. Code § 710:40-1-2