Section 13: Operation of other laws not barred
Nothing in this Act shall be deemed to prevent any person from being prosecuted under any other law for any act or omission which constitutes an offence under this Act:
Provided that no such prosecution shall be instituted except with the previous sanction referred to in section 12.
Source: official text of The Census Act, 1948 as published on India Code (PDF). All sections of the Census Act, 1948.