Here is what bws says......after reading it I have no idea.
C. Competition After Our One-Notrump Opening
After competition following our one-notrump opening:
(a) A double of a natural two- or three-level overcall is negative, of a higher bid is for penalty.
(
© A below-game new-suit jump is forcing.
(d) A redouble of an artificial double is strength-showing.
(e) A double of an artificial bid suggests a penalty double of the escape.
(f) After any penalty suggestion: the opening side is forced to two notrump, below-game new-suit bids are forcing, raises and two notrump are not forcing.
(g) A bid in a suit shown by an artificial defense indicates at least a game-invitation and is forcing to two notrump.
(h) Bids in suits not indicated (although possibly bid) by an artificial action have the same meaning as if the interference had been a natural bid in an indicated suit [for example, one notrump — (two hearts, showing spades) — three hearts is equivalent to one notrump — (two spades, natural) — three hearts].
(i) one notrump — (overcall) — pass — (pass) — double is for takeout, but one notrump — (pass) — pass — (overcall) — double is for penalty.
After one notrump — (pass) — two clubs — (double) — ?, opener should determine his action by first evaluating his club holding (bid if especially weak, pass if average, redouble if especially strong). [default] { take his normal action had intervenor passed when that action is a major-suit bid (otherwise examine his club holding). [leaf] }
After a two-level transfer response to one notrump is doubled [e.g., one notrump — (pass) — two hearts = spades — (double) — ?], opener should
(a) superaccept (bid above two of the suit indicated by responder) with any of the same, or roughly the same, set of hands that would have been suitable for superacceptance had intervenor passed;
(
© redouble rather than pass with significant length and strength in the suit bid.
D. Competition After Our Major-Suit Opening
(See also section F., below)
In responding to a major-suit opening over a takeout double

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