BAM teams, both sides vulnerable, West dealer. ACBL jurisdiction.
4♣ was alerted and explained as a splinter. There was a mild break in tempo before the 4♥ bid. North called the Director after the 4♠ bid to point out the break in tempo. Declarer made 7. At the end of play North recalled the Director and suggested that East was obliged to pass after 4♥.
How do you rule?