• Do the conditions permit carrying and referring to a multi defence during the auction ?

Yes, the WBF Systems Policy permits the use of a written defence at the table in respect to the Multi 2D.  However since the Multi is not BS, those partnerships using it do not have to supply a suggested defence (which they would have to if they were employing BS methods) – it is instead up to their opponents to bring along their own defence.

• Are Odd/Even Signals permitted under WBF Rules?

Yes, the WBF (unlike the ACBL) does not place any restriction upon the use of odd/even signaling.