In the event two-thirds or more of the eligible farmers voting therein shall vote in favor of such assessment, then the said assessment shall be collected annually for the years herein set forth and under such method, rules and regulations as may be determined by the board of directors of the said Tobacco Associates, Incorporated, and the said assessment so collected shall be paid into the treasurer [treasury] of said Tobacco Associates, Incorporated, to be used along  with funds from other sources, for the purpose of stimulating, developing and expanding export trade for flue-cured tobacco and encouraging the use of flue-cured tobacco everywhere. (1959, c. 309, s. 9.)