5 USC 5354 - Effect of detail or affiliation; travel expenses
(a) Status as a student-employee is not terminated by a temporary detail to, or affiliation with another Government or non-Government institution to procure necessary supplementary training or experience pursuant to an order of the head of the agency. A student-employee may receive his stipend and other perquisites provided under this subchapter from the hospital, clinic, or laboratory to which he is assigned or attached for not more than 60 days of a detail or affiliation for each training year, as defined by the head of the agency.