‹ 18.2.4 Withdrawal of Approval of Underlying Securities 18.3.1 Registration › 18.3 Option Transactions 18.3.1 Registration 18.3.2 Responsibility on Registration 18.3.3 Series of Options Open for Trading 18.3.4 Terms of Options 18.3.5 Adjustments to Terms 18.3.6 Suspension of Trading 18.3.7 Resumption of Trading ‹ 18.2.4 Withdrawal of Approval of Underlying Securities 18.3.1 Registration ›