For purposes of this subchapter, the term “written notice of allocation” means any capital stock, revolving fund certificate, retain certificate, certificate of indebtedness, letter of advice, or other written notice, which discloses to the recipient the stated dollar amount allocated to him by the organization and the portion thereof, if any, which constitutes a patronage dividend.
For purposes of this subchapter, the term “qualified check” means only a check (or other instrument which is redeemable in money) which is paid as a part of a patronage dividend, or as a part of a payment described in section 1382(c)(2)(A), to a distributee who has not given consent as provided in paragraph (2)(A) or (B) with respect to such patronage dividend or payment, and on which there is clearly imprinted a statement that the endorsement and cashing of the check (or other instrument) constitutes the consent of the payee to include in his gross income, as provided in the Federal income tax laws, the stated dollar amount of the written notice of allocation which is a part of the patronage dividend or payment of which such qualified check is also a part. Such term does not include any check (or other instrument) which is paid as part of a patronage dividend or payment which does not include a written notice of allocation (other than a written notice of allocation described in paragraph (1)(A)).
For purposes of this subchapter, the term “nonqualified written notice of allocation” means a written notice of allocation which is not described in subsection (c) or a qualified check which is not cashed on or before the 90th day after the close of the payment period for the taxable year for which the distribution of which it is a part is paid.
For purposes of this subchapter, the term “per-unit retain allocation” means any allocation, by an organization to which part I of this subchapter applies, to a patron with respect to products marketed for him, the amount of which is fixed without reference to the net earnings of the organization pursuant to an agreement between the organization and the patron.
The net earnings of such organization may, at its option, be determined by offsetting patronage losses (including any patronage loss carried to such year) which are attributable to 1 or more allocation units (whether such units are functional, divisional, departmental, geographic, or otherwise) against patronage earnings of 1 or more other such allocation units.
For purposes of this subsection, the terms “patronage earnings” and “patronage losses” means  earnings and losses, respectively, which are derived from business done with or for patrons of the organization.
For purposes of section 521 and this subchapter, the marketing of the products of members or other producers shall include the feeding of such products to cattle, hogs, fish, chickens, or other animals and the sale of the resulting animals or animal products.