BS EN 556-1 is the standard that specifies the requirements for a terminally sterilized medical device to be designated “STERILE”.
BS EN 556-2 specifies the requirements for an aseptically processed medical device to be designated “STERILE”.
Designation of a medical device as “STERILE” is only permissible when a validated sterilization process has been applied.
BS EN 556-2:2015 Sterilization of medical devices. Requirements for medical devices to be designated "STERILE". Requirements for aseptically processed medical devices
EN 556-1:2001
EN 556-1:2001/AC:2006