Ohio Rev. Code Ann. § 3742.41 – Presumptions relative to property constructed prior to 1-1-78; registration as lead-safe residential rental unit

(A) A property constructed before January 1, 1950, that is used as a residential unit, child care facility, or school shall be legally presumed not to contain a lead hazard and not to be the source of the lead poisoning of an individual who resides in the unit or receives child care or education at the facility or school if the owner or manager of the unit, facility, or school successfully completes both of the following preventive treatments:
1. (1) Follows the essential maintenance practices specified in section 3742.42 of the Revised Code for the control of lead hazards;
2. (2) Covers all rough, pitted, or porous horizontal surfaces of the inhabited or occupied areas within the unit, facility, or school with a smooth, cleanable covering or coating, such as metal coil stock, plastic, polyurethane, carpet, or linoleum.
(B) The owner or manager of a residential unit, child care facility, or school has successfully completed the preventive treatments specified in division (A) of this section if the unit, facility, or school passes a clearance examination in accordance with standards for passage established by rules adopted under section 3742.49 of the Revised Code.
(C) The legal presumption established under this section is rebuttable in a court of law only on a showing of clear and convincing evidence to the contrary.