(2)Interest shall be credited with effect from the 1st April of each year in the following manner :(i)on the amount at the credit of a subscriber on the 31st March of the preceding year less any sums withdrawn during the current year interest for twelve months;(ii)on sums withdrawn during the current year interest from the 1st April of the current year up to the last date of the month preceding the month of withdrawal;(iii)on all sums credited to the subscriber's account after the 31st March of the preceding year interest from the date of deposit up to 31st March of the current year;(iv)if the total amount of interest contains a fraction of rupee it shall be rounded to the nearest whole rupee (fifty paise being rounded to the next higher rupee).