is on active duty under section 688, 12301(a), 12301(g), 12302, 12304, 12306, or 12406, or chapter 13 of title 10, or any other provision of law during a war or during a national emergency declared by the President or Congress, regardless of the location at which the active duty service is performed; or

in the case of a member of the National Guard, is on full-time National Guard duty (as defined in section 101(d)(5) of title 10) under a call to active service authorized by the President or the Secretary of Defense for a period of more than 30 consecutive days under section 502(f) of title 32 for purposes of responding to a national emergency declared by the President and supported by Federal funds.