If levied, assessments shall be according to the following schedule:
After the completion of each policy year that commences on or after July 1, 2015, for private fund employers or that commences on or after January 1, 2016, for counties and taxing district employers therein, the assessments levied under this section shall be adjusted for the difference between estimated gross payrolls and actual gross payrolls reported by the employer on the payroll report submitted by a private employer pursuant to section 4123.26 of the Revised Code, or, for a public employer, submitted pursuant to section 4123.41 of the Revised Code.
Amounts assessed in accordance with this section shall be collected from each employer as prescribed in rules the administrator adopts.
The moneys derived from the assessment provided for in this section shall be credited to the disabled workers' relief fund created by section 4123.412 of the Revised Code. The administrator shall establish by rule classifications of employers within divisions (A)(1) to (3) of this section and shall determine rates for each class so as to fairly apportion the costs of carrying out sections 4123.412 to 4123.418 of the Revised Code.
Amounts assessed in accordance with this division shall be billed at the same time premiums are billed and credited to the disabled workers' relief fund created by section 4123.412 of the Revised Code. The administrator shall determine the rates for each class in the same manner as the administrator fixes the rates for premiums pursuant to section 4123.29 of the Revised Code.
R.C. § 4123.411