RMS — RecordKeeper is related to ManagedRecord. Shouldn't it be to RecordSet?

We currently attach RecordKeeper to ManagedRecord, but this was established before we discovered the need to manage record disposition through RecordSet. Is there a case wherein records in a RecordSet have different RecordKeeper's?

Delete association between ManagedRecord and RecordKeeper. Establish association between RecordSet and RecordKeeper.
Provide constraint that RecordSet's cannot be merged in less they have identical RecordKeeper history.
Added constraint to RecordSet: “RecordSets cannot be merged unless they have the same RecordKeeper”. This is probably also a constraint on the DispositionInstructions service.
There is an undesirable direction of dependencies. Split the Role subtypes out of the Party package into an RmsRoles package that extends the Party package.