Ohio Revised Code Title IX. Agriculture Animals Fences § 941.52

(A) The director of agriculture may adopt rules providing:

(B) Whenever ninety per cent of the cattle of a township or county or of the entire state that are required to be tested to maintain or establish a modified tuberculosis accredited area or accredited tuberculosis-free area have been tuberculosis tested, authorized persons of the department of agriculture may enter the premises where any of the remaining cattle are kept and test all cattle.