(a) Affect the nature or scope of the work to be performed or volume to be harvested under the terms of the sale contract made by the State Forester; or
(b) Require additional work or harvest in an area adjacent to a timber sale made by the State Forester.
(2) The State Forester is hereby authorized to change or modify the terms or conditions of the contract in the event of unforeseen circumstances requiring such change or modification under subsection (1) of this section only when:
(a) Such change or modification is in the best interest of the State of Oregon; and
(b) The purchaser of the timber sale agrees that the proposed change or modification will maintain an equitable contractual relationship between the parties. [1965 c.128 §2; 1983 c.759 §11; 1997 c.285 §2]