Ohio Revised Code Title XXXVII. Health Safety Morals § 3781.261

(A) An excavator, contractor, utility, designer, engineer, developer, or utility locator who has responsibility to the 811 notification process shall obtain training in the protection of underground utility facilities.

(B) Employers shall provide training at the time of initial assignment.  Retraining of each employee shall occur every five years thereafter, or whenever changes occur to Chapters 3781. or 4913. of the Revised Code.

(C) Employee training provided and training successfully completed shall be documented and retained by the employer.  Employee training requirements shall include the following topics: