Critique the validity of the following statutory regulations applied to individuals holding an Overseas Citizen of India (OCI) card:
1. The legal framework explicitly prohibits OCI cardholders from campaigning for or holding high constitutional offices, including the Presidency.
2. The legal framework grants OCI cardholders absolute parity with resident citizens regarding unhindered access to conduct any domestic research activity.
3. The legal framework enforces a geographic ban, permanently denying OCI eligibility to any individual who has ever held citizenship in Bangladesh.