New Jersey Statutes Title 4. Agriculture and Domestic Animals 4 § 13-27

The by-laws or contracts may require the members to sell all or any part of their specifically enumerated agricultural products, and buy all or any part of their specifically enumerated agricultural supplies, exclusively through the association, but in such case shall specify a reasonable period in each year during which a member, by giving the notice prescribed in the by-laws or contract, may withdraw and be released from his obligation to employ the services of the association in respect to such products and supplies.