- Trading in the security is halted for a maximum period of one trading session.* This may be because of :

1. Critical changes or major events concerning a listed company which have occurred during trading hours. The firm involved must then clarify the situation with the SET immediately.

2. Trading conditions (e.g., price fluctuations) which indicate that some investors may have received important news or information about a listed company before it was formally disseminated to the public.

3. Trading which may have been halted at the request of the issuer in order to allow for clarification of a major development or for a news announcement to be made during trading hours.

4. Major events which may critically influence the ARMS trading system.

*Remarks: The Halt Sign may be removed at any time during the trading session, if deemed appropriate by the SET, and/or following clarification or resolution of the situation.

- Trading in the security is being suspended for more than one trading session. This may be because of :

1. Replacement of the NP sign by the SP sign, following the failure of the issuer to adhere to SET disclosure regulations.

2. Failure of the issuer to follow regulations or to provide adequate explanation in the event its share price changes without legitimate reason.

3. Failure of the issuer to submit required financial statements within the period specified by the SET.

4. The listed securities of the listed company are under delisting consideration or improving their status to eliminate within the period specified by the SET.

5. The listed securities are to become due for redemption or conversion or exercise of right.

6. There is any other event which may seriously affect the trading of any listed securities.

Sufficient disclosure of the additional information, as requested by the SET, has been made by the issuer.

The security of a list company which has incomplete shareholding distribution as stipulated in the regulations of the Exchange regarding maintaining the status of listed companies on the Exchange, and which is required by the Exchange to have its ordinary shares traded according to the Call Market methods