The EBU have recently amended the rules regarding when you should alert or announce your bids.  They also change the requiements for opening a Strong 2 bid in any suit.

An explanation of these rules can be found on Pages 34 and 35 of the latest EBU magazine but also in tabular form if you click on EBU information on the left hand side of this page and then EBU Announcing Rules below it.

If you need any further information, ask the Director of the session.