My partner and I have a pretty neat system for bidding against opponents opening a weak 2 (2 in a Major = <11 HCP, 6-card; 2 Diamonds as either the Multi or weak with diamonds). In this system, if North opens and East passes, that pass has a specific meaning.
Does this 'Pass' need to be alerted? Is it reglementary to alert a 'Pass'?
Same goes for Double, we have some specific agreements for Double in this defense as well. Does that need to be alerted?