(a) Every manufacturer shall specify and every dealer shall provide and fulfill reasonable predelivery and preparation obligations for its tractors and farm equipment prior to delivery of same to retail purchasers.

(b) Every manufacturer shall provide for repair parts availability throughout the reasonable useful life of any tractor or farm equipment sold.

(c) Every manufacturer or distributor shall provide to his dealers, on an annual basis, an opportunity to return a portion of his surplus parts inventory for credit. The surplus parts return procedure shall be administered as follows:

(1) The manufacturer or distributor may specify and thereupon notify his dealers of a time period of at least 60 days' duration, during which time dealers may submit their surplus parts list and return their surplus parts to the manufacturer or distributor;

(2) If a manufacturer or distributor has not notified a dealer of a specific time period for returning surplus parts within the preceding 12 months, then he shall authorize and allow the dealer's surplus parts return request within 30 days after receipt of such request from the dealer;

(3) Pursuant to the provisions of this subsection, a manufacturer or distributor must allow surplus parts return authority on a dollar value of parts equal to 8 percent of the total dollar value of parts purchased by the dealer from the manufacturer or distributor during the 12 month period immediately preceding the notification to the dealer by the manufacturer or distributor of the surplus parts return program, or the month the dealer's return request is made, whichever is applicable; provided, however, that the dealer may, at his option, elect to return a dollar value of his surplus parts less than 8 percent of the total dollar value of parts purchased by the dealer from the manufacturer or distributor during the preceding 12 month period as provided in this subsection;

(4) No obsolete or superseded part may be returned, but any part listed in the manufacturer's, wholesaler's, or distributor's current parts price list at the date of notification to the dealer by the manufacturer or distributor of the surplus parts return program, or the date of a dealer's parts return request, whichever is applicable, shall be eligible for return and credit as specified in this subsection; provided, however, that returned parts must be in new and unused condition and must have been purchased from the manufacturer, wholesaler, or distributor to whom they are returned;

(5) The minimum lawful credit to be allowed for returned parts shall be 85 percent of the wholesale cost thereof as listed in the manufacturer's, wholesaler's, or distributor's current parts price list at the date of the notification to the dealer by the manufacturer, wholesaler, or distributor of the surplus parts return program, or the date of a dealer's parts return request, whichever is applicable; (6) Applicable credit pursuant to this subsection must be issued to the dealer within 30 days after receipt of his returned parts by the manufacturer or distributor; or

(7) Packing and return freight expense incurred in any return of surplus parts pursuant to the terms of this Code section shall be borne by the dealer.