Ohio Revised Code Title XXIX. Crimes Procedure § 2907.19

(1) “Advertisement for sexual activity for hire” or “advertisement” means any advertisement or offer in electronic or print media that includes an explicit or implicit offer for sexual activity for hire to occur in this state.

(2) “Depiction” means any photograph, film, videotape, visual material, or printed material.

(3) “Person” has the same meaning as in section 1.59 of the Revised Code.

(D)(1) In any prosecution under this section, it is not a defense that the offender did not know the age of the person depicted in the advertisement, relied on an oral or written representation of the age of the person depicted in the advertisement, or relied on the apparent age of the person depicted in the advertisement.

(2) In any prosecution under this section, it is an affirmative defense that the offender, prior to purchasing advertising space for the advertisement, made a reasonable bona fide attempt to ascertain the true age of the person depicted in the advertisement by requiring the person depicted in the advertisement to produce a driver's license, marriage license, birth certificate, or other government issued or school issued document that identifies the age of the person, provided the offender retains and produces a copy or other record of the driver's license, marriage license, birth certificate, or other document used to ascertain the age of the person depicted in the advertisement.