(a) Definition. Products mixed in the spray tank with the herbicide, pesticide, or fertilizer formulas that will improve the efficiency and the effectiveness of the chemicals, including sticking agents, wetting agents, etc.

(b) Minimum biobased content. The Federal preferred procurement product must have a minimum biobased content of at least 50 percent, which shall be based on the amount of qualifying biobased carbon in the product as a percent of the weight (mass) of the total organic carbon in the finished product.

(c) Preference compliance date. No later than November 19, 2013, procuring agencies, in accordance with this part, will give a procurement preference for qualifying biobased agricultural spray adjuvants. By that date, Federal agencies that have the responsibility for drafting or reviewing specifications for products to be procured shall ensure that the relevant specifications require the use of biobased agricultural spray adjuvants.