Necessity and compensation for such property shall be determined as provided in 19 V.S.A. chapter 5; provided, however, that "necessity" shall mean a reasonable need in order that the petitioner may render adequate service to the public in the operation of the airport, landing field, or air navigation facility. Any property or right so condemned shall be held by the municipality under an obligation to serve the general public on reasonable terms and without discrimination. (Added 1985, No. 222 (Adj. Sess.), § 2.)