New Budget Authority Law and Legal Definition
“The term "new budget authority" means, with respect to a fiscal year--
(i) budget authority that first becomes available for obligation in that year, including budget authority that becomes available in that year s [as] a result of a re-appropriation; or
(ii) a change in any account in the availability of un-obligated balances of budget authority carried over from a prior year, resulting from a provision of law first effective in that year; and includes a change in the estimated level of new budget authority provided in indefinite amounts by existing law.” (2 USCS § 622)