Income Tax Act, 1967.

Failure to act within required time.

507.—For the purposes of this Part, a person shall be deemed not to have failed to do anything required to be done within a limited time if he did it within such further time, if any, as the Commissioners or officer concerned may have allowed; and where a person had a reasonable excuse for not doing anything required to be done, he shall be deemed not to have failed to do it if he did it without unreasonable delay after the excuse had ceased.