If a written contract for the purchase of grain does not include an act of God clause that relieves the seller of the grain from any obligation to fulfill the contract due to acts of God or other unavoidable accidents which prevent the performance of the contract, the purchaser of the grain shall clearly and conspicuously disclose the absence of that act of God clause on the front page of the written contract. The notice required by this section shall be separately and clearly stated in at least ten-point bold-face type.