¹[7B. Interest payable by Government.--The Central Government shall pay simple interest at ²[fifteen per cent.] per annum on the amount by which the aggregate sum of any installments of advance tax paid during any financial year in which they are payable under section 7A exceeds the amount of the tax determined on regular assessment, from the 1st day of April next following the said financial year to the date of the regular assessment for the assessment year immediately following the said financial year.]