Definitions.
CFR · 2024-01-01 · US · Title 5
In this subpart— (a) The situation to be redressed results from circumstances beyond the organization's control and otherwise would require extensive corrective action; or (b) A position at the next lower grade in the normal line of promotion does not exist and the resulting action is not a career ladder promotion; or (c) There is a shortage of candidates for the position to be filled.
official document · source cfr-2024 · id 5:§ 300.602