Duration of revenue

(1) When the table of revenue-rates for any area has been finally published, the rates specified therein shall remain in force for a period of thirty years. (2) Notwithstanding any thing contained in sub-section (1 )- (a) revenue-rates may be altered or revised in any year after the expiry of every ten years from the date on which the table of revenue-rates was introduced, in such manner and to such extent as may be prescribed ; (b) When the circumstances of a local area are such that a fresh determination of the revenue-rates is in the opinion of the Government inexpedient, it may extend the term of settlement by such further period as it may think necessary rates.