NS are playing 15-17 1N with 5-card majrs.
EW play weak jump overcalls (but when pard is passed hand and vulnerable then the agreement is the weak jumps should be sound, so likely to be upper end of weak/possibly more).
West hesitated before passing, so evidently had something to think about.
2♠ is passed out with NS reserving their rights after West's hesitation.
TWO QUESTIONS
Q1) Is East constrained from bidding 2♠ after East's hesitation?
Q2 How do you do rule?
PS You aren't asked to comment on whether East's bid is sensible/kamikaze! You are merely asked to determine whether East may bid here after his partner's hesitation
[This post edited to include MP as form of scoring. No other changes.]