Notice of Filing and Immediate Effectiveness of Proposed Rule Change to (1) Delete Dealings and Settlements (Rule 45-299C), Rule 235 (Ex-Dividend, Ex-Rights), Rule 236 (Ex-Warrants), and Rule 257 (Deliveries After "Ex" Date) and (2) Amend Dealings and SettlementsT (Rule 45-299C), Rule 235T (Ex-Dividend, Ex-Rights), Rule 236T (Ex-Warrants), and Rule 257T (Deliveries After "Ex" Date)