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unanticipated

Defined in 2 places of the United States Code.

The term “unanticipated” means that the underlying situation is—

(A) sudden, which means quickly coming into being or not building up over time;

(B) urgent, which means a pressing and compelling need requiring immediate action;

(C) unforeseen, which means not predicted or anticipated as an emerging need; and

(D) temporary, which means not of a permanent duration.

Source

2011–present 2 U.S.C. § 900The Congress · Statement of budget enforcement through sequestration; definitions · as used in this subchapter

The terms “emergency” and “unanticipated” have the meanings given to such terms in section 900(c) of this title.

Source