579B.2  Lien depends upon production contracts.
  1.  A lien established under section 579B.3 depends upon the execution of a production contract that provides for producing a commodity owned by a contractor by a contract producer at the contract producer’s contract operation.
  2.  A production contract is executed when it is signed or orally agreed to by each party to the contract or by a person authorized by a party to act on the party’s behalf, including the contract producer’s personal representative.
  3.  This chapter applies to any production contract that is in force on or after May 24, 1999, regardless of the date that the production contract is executed.
99 Acts, ch 169, §15, 22, 24