Certification by Exchanges (Rules 12d1-1 to 12d1-6) Rule 12d1-1 — Registration effective as to class or series. Rule 12d1-2 — Effectiveness of registration. Rule 12d1-3 — Requirements as to certification. Rule 12d1-4 — Date of receipt of certification by commission. Rule 12d1-5 — Operation of certification on subsequent amendments. Rule 12d1-6 — Withdrawal of certification.