Sec. 20. (a) All the owners of a tract that is the subject of an order issued under section 19 of this chapter are jointly and severally responsible for the payment of the amount determined under section 19(c)(4) of this chapter.
(b) An owner of a tract who pays all of or a portion of the amount may bring an action to obtain contribution from an owner of the tract who did not pay an equal or a greater portion of the amount.
(c) An owner of a tract that is the subject of an order issued under section 19 of this chapter is subject to an action under section 22 of this chapter if the owner fails to pay the amount for which the owner is responsible under the order.