10.5.1 Extraordinary situations
1 Should an extraordinary situation arise, the Exchange may institute all the market control measures which it deems necessary to maintain fair and orderly trading as far as possible.
2 The Exchange may intervene in trading as it considers necessary, in particular by delaying the opening of trading in a security, interrupting continuous trading in a security, deleting orders or declaring trades invalid.
3 The following specific circumstances shall be deemed to be extraordinary situations:
major price volatility, especially where a trade differs significantly from the market price;
decisions or information which are to be published imminently and which might have a significant influence on the price of a security (price-sensitive facts); or
other situations that might compromise fair and orderly trading.
4 The details are laid down in the "Market Control" Directive.