Failure to comply with declarer disallowing lead of a specific suit after a penalty card
In a recent match, west revoked with a spade but the revoke wasnt established. The spade was left as a penalty card. When east gained the lead, declarer disallowed a spade lead (the spade being returned to the west hand). After some thought, east led a spade. What law deals with this? At the table we made east’s spade a pen card. Law52b covers the failure to comply with playing pen card but I couldn’t find any law about a defender failing to comply with declarer disallowing a specific suit?