The secretary shall enforce this chapter and adopt and enforce such regulations relating to the manufacture, guaranteeing, labeling, and distribution of, the manner of reporting tonnage for, and making inspection tonnage fee payments upon, fertilizing materials as the secretary determines necessary to carry out this chapter. A copy of those regulations shall be mailed promptly upon adoption to each person who is licensed pursuant to this chapter. The failure of any licensee to receive a copy of the regulations is not a defense to a violation of the regulations.