§ 697-b. Affirmative defenses. It shall be an affirmative defense to claim under this section that: (a) the nonconformity, defect or condition does not substantially impair the value, use or safety of the equipment; (b) the nonconformity, defect or condition is the result of abuse, neglect or unauthorized modifications or alterations of the farm equipment; (c) a claim by the consumer was not filed in a timely manner; or (d) any other affirmative defense allowed by law.