Ohio Revised Code Title IX. Agriculture Animals Fences § 905.321

(A) Beginning September thirtieth of the third year after August 21, 2014, no person shall apply fertilizer for the purposes of agricultural production unless that person has been certified to do so by the director of agriculture under this section and rules or is acting under the instructions and control of a person who is so certified.

(B) Except as otherwise provided in this division, a person shall be certified to apply fertilizer for purposes of agricultural production in accordance with rules. A person that has been so certified shall comply with requirements and procedures established in those rules.

The director shall issue a certification to apply fertilizer for purposes of agricultural production in accordance with Chapter 4796. of the Revised Code to an individual if either of the following applies:

(C) A person that has been licensed as a commercial applicator under section 921.06 of the Revised Code or as a private applicator under section 921.11 of the Revised Code may apply to be certified under this section, but shall not be required to pay the application fee for certification established in rules adopted under section 905.322 of the Revised Code.