Each study with its own team and approval
The user who creates a study is its principal investigator; co-investigators join the team. The researcher role does not grant access to every study. The organization owner approves studies and is responsible for governance; in studies whose team they are not on, owners do not see participant data.
After approval, date shifts beyond 30 days in total or changes to the data scope need a request with a reason and the owner’s approval. Every status change is written to the study’s timeline and to a chained audit trail.