(1) A household shall be eligible for food stamp benefits only if the combined countable resources of all household members do not exceed $3000.
(2) In determining eligibility for food stamps, vehicles owned by a member of the household shall be counted as follows:
(a) the value of any income-producing vehicle shall be excluded;
(b) the value of one vehicle which is not income-producing shall be excluded regardless of the vehicle's value;
(c) the equity value of each vehicle which is not otherwise excluded shall be counted as a resource to the household. Equity value is obtained by subtracting from the fair market value of the vehicle the amount of any enforceable lien, encumbrance, or security interest in the vehicle.