Mo. Rev. Stat. § 265.505
The director of the department of agriculture is hereby authorized and may establish all necessary and reasonable regulations and fees for carrying out the provisions of sections 265.500 to 265.515. No regulation, or any amendment or repeal thereof, provided for in sections 265.500 to 265.515 shall be adopted, except after public hearing to be held after no less than twenty days prior legal notice by advertisement of the date, time, and place of hearing. In establishing regulations for carrying out the provisions of sections 265.500 to 265.515 the director shall by regulation provide for containers for samples which will maintain the sample in the same condition as when taken, and provide for seals for the sample containers which will insure against tampering.
§ 265.505, RSMo