Ohio Rev. Code Ann. § 3513.191
(B) Notwithstanding division (A) of this section, either of the following persons may be candidates for nomination of any political party at a party primary:
(C)
(1) Notwithstanding division (A) of this section, a person who holds an elective office for which candidates are nominated at a party primary may be a candidate at a primary election held during the times specified in division (C)(2) of this section for nomination as a candidate of a political party of which the person is prohibited from being a candidate for nomination under division (A) of this section if the person files a declaration of intent to seek the nomination of that party and if, by filing the declaration, the person has not violated division (C)(3) of this section. The declaration of intent shall: