price spike tax for such prescription drug. (2) Limitation In the case of a taxable prescription drug for which the applicable period (as determined under subsection (c)(2)(E)(i)) is less than 2 calendar years, the cumulative price spike tax shall not apply. (3) Exemption For any calendar year in which the Secretary of Health and Human Services has provided an exemption for a taxable prescription drug pursuant to section 2(d) of the Stop Price Gouging Act , the amount of the tax determined under paragraph (1) for such drug or device for such calendar year shall be reduced to zero. (b) Annual price spike tax (1) In general The amount of the annual price spike tax shall be equal to the applicable percentage of the price spike revenue received by the applicable entity on the sale of the taxable prescription drug during the calendar year. (2) Applicable percentage For purposes of paragraph (1), the applicable percentage shall be equal to— (A) in the case of a taxable prescription drug which has been subject to a price spike percentage greater than the applicable price increase allowance (as defined in section 2(a)(6)(C) of the Stop Price Gouging Act ) but less than 15 percent, 50 percent, (B) in the case of a taxable prescription drug which has been subject to a price spike percentage equal to or greater than 15 percent but less than 20 percent, 75 percent, and (C) in the case of a taxable prescription drug which has been subject to a price spike percentage equal to or greater than 20 percent, 100 percent. (c) Cumulative price spike tax (1) In general The amount of the cumulative price spike tax shall be equal to the applicable percentage of the cumulative price spike revenue received by the applicable entity on the sale of the taxable prescription drug during the calendar year. (2) Applicable percentage (A) In general For purposes of paragraph (1), the applicable percentage shall be equal to— (i) in the case of a taxable prescription drug which has been subject to a cumulative price spike percentage greater than