Section 78G(2) in The Calcutta Improvement Act, 1911
(2)Every payment due from any person in respect of a betterment fee and every charge referred to in sub-section (1) shall, notwithstanding anything contained in any other enactment and notwithstanding the existence of any mortgage or other charge whether legal or equitable created either before or after the commencement of the Calcutta Improvement (Amendment) Act, 1931, be the first charge upon the interest of such person in such land.