Promotion.
CFR · 2024-01-01 · US · Title 5
An agency may promote a student appointed for an initial period expected to last more than 1 year but less than 4 years provided the student meets the qualification requirements for the higher graded position, time in grade requirements in 5 CFR part 300, subpart F, and the public notification for the position filled by the student stated the potential for promotion and specified a career ladder.
official document · source cfr-2024 · id 5:§ 316.909