Section 301.290 - Correctional enterprises to manufacture plates and highway signs - money received for manufacturing plates and signs, how deposited1. Correctional enterprises of the department of corrections shall purchase, erect and maintain all of the machinery and equipment necessary for the manufacture of the license plates and tabs issued by the director of revenue, and of signs used by the state transportation department. Beginning on January 1, 2011, correctional enterprises shall no longer erect and maintain tabs for the department of revenue.2. The director of revenue shall procure all plates issued by him, and the state transportation department shall procure all signs used by it from correctional enterprises, unless an emergency arises and correctional enterprises cannot furnish the plates, tabs or signs.3. Correctional enterprises shall furnish the plates and signs at such a price as will not exceed the price at which such plates and signs may be obtained upon the open market, but in no event shall such price be less than the cost of manufacture, including labor and materials.4. All moneys derived from the sale of the plates, tabs and signs shall be paid into the state treasury to the credit of the working capital revolving fund as provided in section 217.595.