(1) No tax credit certificate granted under section 280Z or section 280ZC shall be produced before the Assessing Officer after the 31st day of March, 1991 for the purposes of sub-section (6) of section 280Z or, as the case may be, sub-section (4) of section 280ZC.
(2) Save as otherwise provided in sub-section (1), Chapter XXII-B shall be omitted.