46 C.F.R. § 199.510 EPIRB requirements.
Title 46 - Shipping
(a) Each vessel must carry a category 1 406 MHz satellite EPIRB meeting the requirements of 47 CFR part 80. (b) When the vessel is underway, the EPIRB must be stowed in its float-free bracket with the controls set for automatic activation and be mounted in a manner so that it will float free if the vessel sinks.
Title 46: Shipping
PART 199—LIFESAVING SYSTEMS FOR CERTAIN INSPECTED VESSELS
Subpart E—Additional Requirements for Vessels Not Subject to SOLAS
§ 199.510 EPIRB requirements.