In the case of kerosene which is exempt from the tax imposed by section
4041
(c) (other than by reason of a prior imposition of tax) and which is removed from any refinery or terminal directly into the fuel tank of an aircraft, the rate of tax under section
4081
(a)(2)(A)(iii) shall be zero. For purposes of this subsection, any removal described in section
4081
(a)(3)(A) shall be treated as a removal from a terminal but only if such terminal is located within a secure area of an airport.