Ohio Rev. Code Ann. § 1547.11
(A) No person shall operate or be in physical control of any vessel underway or shall manipulate any water skis, aquaplane, or similar device on the waters in this state if, at the time of the operation, control, or manipulation, any of the following applies:
(6) Except as provided in division (H) of this section, the person has a concentration of any of the following controlled substances or metabolites of a controlled substance in the person's whole blood, blood serum or plasma, or urine that equals or exceeds any of the following:
(i) Either of the following applies:
(B) No person under twenty-one years of age shall operate or be in physical control of any vessel underway or shall manipulate any water skis, aquaplane, or similar device on the waters in this state if, at the time of the operation, control, or manipulation, any of the following applies:
(D)
(1)
(E)
(1) In any criminal prosecution or juvenile court proceeding for a violation of division (A) or (B) of this section, of a municipal ordinance relating to operating or being in physical control of any vessel underway or to manipulating any water skis, aquaplane, or similar device on the waters of this state while under the influence of alcohol, a drug of abuse, or a combination of them, or of a municipal ordinance relating to operating or being in physical control of any vessel underway or to manipulating any water skis, aquaplane, or similar device on the waters of this state with a prohibited concentration of alcohol, a controlled substance, or a metabolite of a controlled substance in the whole blood, blood serum or plasma, breath, or urine, if a law enforcement officer has administered a field sobriety test to the operator or person found to be in physical control of the vessel underway involved in the violation or the person manipulating the water skis, aquaplane, or similar device involved in the violation and if it is shown by clear and convincing evidence that the officer administered the test in substantial compliance with the testing standards for reliable, credible, and generally accepted field sobriety tests for vehicles that were in effect at the time the tests were administered, including, but not limited to, any testing standards then in effect that have been set by the national highway traffic safety administration, that by their nature are not clearly inapplicable regarding the operation or physical control of vessels underway or the manipulation of water skis, aquaplanes, or similar devices, all of the following apply:
(F)
(1) Subject to division (F)(3) of this section, in any criminal prosecution or juvenile court proceeding for a violation of division (A) or (B) of this section or for an equivalent offense that is substantially equivalent to either of those divisions, the court shall admit as prima-facie evidence a laboratory report from any laboratory personnel issued a permit by the department of health authorizing an analysis as described in this division that contains an analysis of the whole blood, blood serum or plasma, breath, urine, or other bodily substance tested and that contains all of the information specified in this division. The laboratory report shall contain all of the following:
(H) Division (A)(6) of this section does not apply to a person who operates or is in physical control of a vessel underway or manipulates any water skis, aquaplane, or similar device while the person has a concentration of a listed controlled substance or a listed metabolite of a controlled substance in the person's whole blood, blood serum or plasma, or urine that equals or exceeds the amount specified in that division, if both of the following apply:
(I) As used in this section and section 1547.111 of the Revised Code:
(6) "Equivalent offense that is watercraft-related" means an equivalent offense that is one of the following: