Ohio Rev. Code Ann. § 5120.42

The department of rehabilitation and correction shall make rules for the proper execution of its powers and may require the performance of additional duties by the officers of the several institutions, so as to fully meet the requirements, intents, and purposes of Chapter 5120. of the Revised Code, and particularly those relating to making estimates and furnishing proper proof of the use made of all articles furnished or produced in such institutions. In case of an apparent conflict between the powers conferred upon any managing officer and those conferred by such sections upon the department, the presumption shall be conclusive in favor of the department.