to administer such plan in accordance with its terms and conditions;

to make rules and regulations to effectuate the terms and conditions of such plan;

to receive, investigate, and report to the Secretary complaints of violations of such plan; and

to recommend to the Secretary amendments to such plan.

funds collected by the board shall be used for research, development, advertising, or promotion of potatoes and potato products and such other expenses for the administration, maintenance, and functioning of the board, as may be authorized by the Secretary, including any referendum and administrative costs incurred by the Department of Agriculture under this chapter: Provided, That the provision for payment to the Department of Agriculture for any referendum and administrative costs so incurred shall not be subject to producer approval, or importer approval when importers are subject to a plan, in a referendum;

no advertising or sales promotion program shall make any reference to private brand names or use false or unwarranted claims in behalf of potatoes or their products or false or unwarranted statements with respect to the attributes or use of any competing products; and

no funds collected by the board shall in any manner be used for the purpose of influencing governmental policy or action, except as provided by subsection (a)(4) of this section.