Property subject to taxation under this chapter shall be assessed by the assessor or board of assessors of the town in which it is located at seventy per cent of the fair market value as determined by a person certified by the state as a real estate appraiser, provided such appraiser is selected by a majority vote of the chief executive officers of the towns of East Granby, Suffield, Windsor and Windsor Locks. The services of the appraiser selected shall be paid for by the towns of East Granby, Suffield, Windsor and Windsor Locks in proportion to the percentages for each town set forth in § 15-101cc. Not later than August first in any assessment year, the appraiser shall provide to the assessor or board of assessors of each of the towns listed in said section and to the lessee of the property, the fair market value of the property subject to taxation under this chapter as of October first in such assessment year. The appraiser shall be responsible for making a determination of taxability or nontaxability of leasehold interests under this chapter. If any town or the lessee is aggrieved by the determination of the appraiser concerning (1) the taxability of real property under the provisions of this chapter, or (2) the valuation thereof, such town or the lessee may, within thirty days of the receipt of written notice of such determination, appeal to the superior court for the judicial district where such property is located. Such appeals shall be preferred cases, to be heard, unless cause appears to the contrary, at the first session, by the court.