TAX ON INSURANCE MATURITY

        THE MATURITY AMMOUNT OF INSURANCE POLICY IS TAXABLE IF ANYTIME THE INSURANCE PREMIUM EXCEEDS MORE THAN 20% OF THE SUM ASSURED.
        SO,WHAT PREMIUM HAS TO BE TAKEN INTO ACCOUNT WHILE CALCULATING 20% OF THE SUM ASSURED....IS IT THE YEARLY PREMIUM PAID ONLY OR THE TOTAL PREMIUM PAID DURING THE ENTIRE POLICY PERIOD?
        ALSO,IF IT IS VALID ON SINGLE PREMIUM POLICIES ONLY OR ALSO ON THE ANNUAL/QUARTERLY PREMIUM POLICIES TO?

THANKS.....