SDCL § 47-16-11: Votes by member cooperatives.

In the case of a cooperative composed only of member cooperative corporations, such member cooperatives shall have only one vote, except that the articles may permit either or both:

(1) A member cooperative to cast additional votes not exceeding a number equal to its membership;

(2) A cooperative whose member-patrons include other cooperative corporations to base voting in whole or in part on a patronage basis.