4.1 406 MHz satellite EPIRBs should be inspected
and tested in accordance with MSC/Circ.1040.
4.2 Shore-based maintenance of all satellite EPIRBs,
as defined in paragraph 1.2, should be carried out in accordance with
these guidelines at intervals specified by the flag Administration
and not exceeding 5 years. It is recommended that the maintenance
be performed at the time when the battery is to be changed.