Ohio Revised Code Title XIII. Commercial Transactions § 1301.302

(A) Except as otherwise provided in division (B) of this section or elsewhere in Chapter 1301., 1303., 1304., 1305., 1307., 1308., 1309., or 1310. of the Revised Code, the effect of provisions of Chapters 1301., 1303., 1304., 1305., 1307., 1308., 1309., and 1310. of the Revised Code may be varied by agreement.

(B) The obligations of good faith, diligence, reasonableness, and care prescribed by Chapter 1301., 1302., 1303., 1304., 1305., 1307., 1308., 1309., or 1310. of the Revised Code may not be disclaimed by agreement. The parties, by agreement, may determine the standards by which the performance of those obligations is to be measured if those standards are not manifestly unreasonable. Whenever Chapter 1301., 1302., 1303., 1304., 1305., 1307., 1308., 1309., or 1310. of the Revised Code requires an action to be taken within a reasonable time, a time that is not manifestly unreasonable may be fixed by agreement.

(C) The presence in certain provisions of Chapter 1301., 1302., 1303., 1304., 1305., 1307., 1308., 1309., or 1310. of the Revised Code of the phrase “unless otherwise agreed”, or words of similar import, does not imply that the effect of other provisions may not be varied by agreement under this section.