Dependent status is tied to the principal's period, so a program running past it depends on an extension being sought and granted in time. Nothing guarantees a particular outcome or a processing time, which argues for planning early and around term boundaries.
Map the program against the status period
Place the principal's admission period next to the program's start, term breaks, and expected completion. Where the program extends beyond, identify when extension steps would sensibly begin and what the employer needs to provide. Avoid paying non-refundable deposits for terms falling past the current period until the extension picture is clearer, and confirm the institution's refund rules in advance.
Admission is granted for up to three years at a time and can be renewed while the professional employment continues, either at a port of entry with a fresh letter or by petition. Travel arrangements should remain consistent with the authorization obtained and should not presume that a contract deadline guarantees admission. A registrar’s transcript, a credential evaluation and a corrected employer letter each move at their own pace, and none of them accelerates because a contractor needs somebody on site by a particular week.