Swiss Pairs, MPs -> VPs
Result: 4♥X(N)-1, NS-200
East's 3♣ overcall was intermediate. His first double was not alerted. NS called me at the end of play to query this "takeout" double. I asked EW what their agreement is for doubles in competition. East thought that all doubles at the three-level and above were for penalties, West was not sure of their agreement. South said she would not have bid 4♥ had she known this might have been a penalty double.
The regulations say that doubles of suit bids up to 3♠ which show the suit bid should not be alerted if for takeout, alerted otherwise.
What's your ruling?