31.1 Upon the CSU's approval of deposit or withdrawal into the CSDR System, the deposited securities shall be credited to the balance position of the securities account nominated by the Participant (house or client account), and withdrawal of a security from the Central Depository shall be debited to the balance position of the securities account nominated by the Participant.

31.2 Upon crediting the securities to the securities account, such securities shall be eligible for the Central Securities Registry operations and transactions.

31.3 Prior to effecting a sell trade on a particular security, and for which security there is no sufficient position in the relevant securities account at that time, the Participant shall deposit the securities in the relevant securities account in a quantity sufficient to ensure the settlement of such security pursuant to the trade.