(a) The landowner or pesticide operator who is allegedly responsible for the loss; and
(b) The person for whom the pesticide was applied if that person is not the person commencing the action.
(2) For the purposes of this section:
(a) "Landowner" includes any person, firm, corporation, the state, any county within the state, or municipality, shown by records of the county to be the owner of land or having such land under contract for purchase.
(b) "Pesticide operator" has the meaning given in ORS 634.006. [1991 c.351 §3; 1995 c.96 §1]