Section 308A.459 - Valuation; potential additional tax liability(1) The county assessor shall value land for conservation easement special assessment in accordance with this section.(2) For property that was specially assessed during the previous assessment year under a special assessment law listed in ORS 308A.706(1)(d), the property shall have a specially assessed value, a maximum assessed value and an assessed value determined under whichever of the following was an applicable method of valuation for the previous assessment year: (a) ORS 308A.050 to 308A.128; or(b) ORS 321.354 or 321.833.(3) 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: (a) Determined under ORS 321.354 or 321.833 if, at the time of application, the land has growing upon it trees of a marketable species and in numbers sufficient to meet requirements for designated forestland under ORS 321.358 or 321.839; or(b) If the criteria set forth in paragraph (a) of this subsection are not satisfied, determined under ORS 308A.050 to 308A.128.(4) For property subject to conservation easement special assessment, the county assessor shall enter on the assessment and tax roll the notation "potential additional tax liability" until the land is disqualified under ORS 308A.465.