Section 166(1) in Gauhati Municipal Corporation Act, 1971
(1)The Corporation may, if it thinks fit, employ one or more persons to assist the Commissioner in connection with the valuation of any land or building and any person so employed shall have power, at all reasonable times and after giving due notice, and or production, if so required, of authorisation in writing in that behalf from the Commissioner to enter on, survey and value any land or building which the Commissioner may direct him to survey and value.