(viii) A business affiliate that, directly or indirectly is controlled by or is under common control with, such individual, partnership, corporation or association. Provided, however, That an account owned by any shareholder or member of a cooperative association of producers, within the meaning of section 6a of the Act, which association is registered as a futures commission merchant and carries such account on its records, shall be deemed to be an account of a customer and not a proprietary account of such association, unless the shareholder or member is an officer, director or manager of the association.
17 CFR § 1.3
Words used in the singular form in the rules and regulations in this chapter shall be deemed to import the plural and vice versa, as the context may require. The following terms, as used in the Commodity Exchange Act, or in the rules and regulations in this chapter, shall have the meanings hereby assigned to them, unless the context otherwise requires: