Had the following auction come up with opps silent:
P - 1♦ - 1♥ - 1NT - 2♣
It seems like the 2♣ bid (by a passed hand) should be natural. If you have 5 and are like 5/3/3/2, you should just pass in case you push the partnership too high. With 6 you can rebid your suit. With 5 hearts and say... 4-5 clubs, you can bid 2♣, which can be passed, pulled back to diamonds, or pulled back to hearts.
My partner and I hadn't discussed it, but are leaning towards NMF only being biddable by unpassed hands. Just thought I would see if others do this as well, since it wasn't mentioned in description of NMF I looked up earlier.
Thanks for any insight
Eric

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