exbleep
LE

COs powers were sometimes delegated to detachment commanders.Most independent sub-units are placed under the command of a unit for administrative purposes in my experience. I can't think of many where CO's powers are more or less permanently delegated but I guess it happens.
In one case, a unit in Belize being part of a larger unit based in UK came under the admin control of the local battalion but the detachment commander, a Captain, was granted powers of a CO.
I think there are other type units like that as well.