Pub. L. 89-554, tit. 5, pt. III, subpt. B, ch. 33, subch. III, sec. 3341
Details; within Executive or military departments
§ 3341. Details; within Executive or military departments (a) The head of an Executive department or military department may detail employees among the bureaus and offices of his department, except employees who are required by law to be exclusively engaged on some specific work. (b) Details under subsection (a) of this section may be made only by written order of the head of the department, and may be for not 80 Stat. 425more than 120 days. These details may be renewed by written order of the head of the department, in each particular case, for periods not exceeding 120 days.