The Mandatory Responsibilities are defined in section 3.2 of OAIS:
The OAIS shall:
Negotiate for and accept appropriate information from information Producers.
Obtain sufficient control of the information provided to the level needed to ensure Long Term Preservation.
Determine, either by itself or in conjunction with other parties, which entities should become the Designated Community, that is, the communities that should be able to understand the information provided. Definition of the Designated Community includes a determination of their Knowledge Base.
Ensure that the information to be preserved is Independently Understandableto the Designated Community. In particular, the Designated Community should be able to understand the information without needing special resources such as the assistance of the experts who produced the information.
Follow documented policies and procedures which ensure that the information is preserved against all reasonable contingencies, including the demise of the Archive, ensuring that it is never deleted unless allowed as part of an approved strategy. There should be no ad-hoc deletions.
Make the preserved information available to the Designated Community and enable the information to be disseminated as copies of, or as traceable to, the original submitted Content Information with evidence supporting its Authenticity.