Or. Rev. Stat. § 308A.427
(1) The county assessor shall value land for wildlife habitat special assessment in accordance with this section.
(a) For property that was specially assessed during the previous assessment year under a program listed in ORS 308A.706 (1)(d), the property shall continue to have a specially assessed value, a maximum assessed value and an assessed value as determined under whichever of the following was an applicable method of valuation for the previous assessment year:
(b) For property that was not specially assessed during the previous assessment year, the property shall have a specially assessed value, a maximum assessed value and an assessed value:
[2003 c.539 §9]