(a) It is the duty of the commissioner, who may act through his or her authorized agent, to sample, inspect, make analyses of, and test regulated products distributed within this state at any time and place and to such an extent as he or she may consider necessary to determine whether such regulated products are in compliance with the provisions of this article. The commissioner individually or through his or her agent is authorized to enter upon any public or private premises or carriers during operating hours in order to have access to regulated products subject to the provisions of this article and the rules pertaining thereto, and to the records relating to their distribution.

(b) The methods of sampling and analysis to determine plant food deficiencies in fertilizer or deficiencies in other regulated products shall be those established by the Association of American Plant Food Control Officials and AOAC International or other methods approved by the commissioner by legislative rule.

(c) The commissioner, in determining for administrative purposes whether any fertilizer is deficient in plant food, or whether any other regulated product in compliance with this article shall be guided solely by the official sample as defined in subsection(v), section one of this article, and obtained and analyzed as provided for in subsection (b) of this section.

(d) The results of official analysis of regulated products and portions of official samples, shall be distributed by the commissioner as provided by legislative rule. The results of official analysis of fertilizers and portions of official samples shall be distributed by the commissioner as provided by legislative rule. Official samples establishing a penalty for nutrient deficiency shall be retained for a minimum of thirty days from issuance of a deficiency report.