This document summarizes regulations for changes and modifications to registered medical devices across Russia, Kazakhstan, and Belarus. It outlines three procedures - amendment, notification, and re-registration. An amendment procedure allows for name, address, or accessory changes and is fastest in Russia and Kazakhstan but requires full re-registration in Belarus. A notification procedure in Russia addresses certain indication, storage, marking, or software changes and is approved within 30 days. All other changes generally require the full re-registration process.