(1) The commissioner shall sample, inspect, make analyses of, and test commercial fertilizers, soil conditioners, plant amendments, and compost distributed within this state at such time and place and to such an extent as the commissioner deems advisable to determine whether such products are in compliance with the provisions of this article. The commissioner is authorized to enter upon any public or private premises or carriers during regular business hours in order to access commercial fertilizers, soil conditioners, plant amendments, and compost subject to the provisions of this article and the rules adopted pursuant to this article.

(2) The methods of analysis and sampling shall be those adopted by the commissioner from sources including the association of official analytical chemists international or a successor organization, Colorado state university, or other authoritative sources deemed reliable by the commissioner.

(3) The commissioner, in determining whether any commercial fertilizer, soil conditioner, plant amendment, or compost violates this article, shall base such determination solely upon official samples obtained and analyzed in accordance with subsections (1) and (2) of this section.

(4) The result of an analysis of a sample of any commercial fertilizer, soil conditioner, plant amendment, or compost that indicates a deficiency shall be forwarded promptly to the registrant. Upon request within thirty days after the date the analysis report is forwarded, the commissioner shall furnish to the registrant a portion of any official sample. If, within forty-five days after forwarding of the analysis report indicating a deficiency, no adequate evidence contradicting the analysis report is made available to the commissioner, the report of the sample analysis shall become official.