When Does a Notrump Bid Promise a Stopper(s)?
Notrump openings and rebids
An opening bid of 1NT or 2NT shows a balanced hand (“standard” would be 15-17 and 20-21 respectively), but neither promises all suits stopped.
Opener’s 1NT or jump-to-2NT rebid also show balanced hands (12-14 and 18-19, respectively) but also don’t promise stoppers in all suits. For example:
I would rebid 1NT