Before issuing a marketing program for the written assent of producers, which contains provisions for the purpose of regulating the flow of the commodity, or any grade or size of it, to market without restricting the total quantity which may be marketed during the season, or which marketing program provides for the establishment of grade, size, quality, or condition specifications, for uniform grading and inspection, or for advertising and trade promotion, the director shall make all of the following findings with respect to the marketing program: