2 level openers

2 ♣  8PT in an unspecified suit or 22-23 balanced or 25-26 balanced
2  GF or 24 balanced or 27-28 balanced or weak 2 in 's or weak 2 in ♠ 's
2  5+ 's and 4+ of a minor 6-10
2 ♠  5+ ♠ 's and 4+ of another 6-10
2NT 20-21

Continuation Over 2 ♣  
2 =relay/negative
2 / ♠ =positive, good suit
2NT =10-12 balanced no suit
3 ♣ / =positive, good suit
3NT =13-15 balanced no suit

Continuation Over 2  

Opening
bid
Reply Meaning Openers
rebid
Meaning
2 2 Pass or convert Pass Natural weak
      2NT 24 "balanced"
      3♣ GF natural
      3 GF natural
      3 GF natural
      3♠ GF natural
      3NT 27-28 "balanced"
  2♠ 10-12 and 4 's
Pass, convert or raise
2NT 24 "balanced"
      3♣ GF natural
      3 GF natural
      3 weak weak 2
      3♠ GF natural
      3NT 27-28 "balanced"
 2NTEnquiry, normally 12+ HCP3 ♣ strong weak 2 in 's
     3 strong weak 2 in ♠ 's
     3 weak weak 2 in 's
     3 ♠ weak weak 2 in ♠ 's
     3NTany game force (i.e. slam zone)
Slam forcing auction
22NT 3NT 4 ♣ = gerberNormal Gerber responses
   4 = stayman(4NT shows no 4 card major and asks for aces)
      4 = 5+suit
      4 ♠ = 5+suit


Continuation Over 2  
2 ♠ weak to play
2NTwhat's the other suit? (may be an invitational raise)
3 ♣weak to play
3 weak, pre-emptive
3 ♠ 1RF solid suit (may be missing Ace)
3NTSerious
4 anyCue
4 weak pre-emptive

Continuation Over 2 ♠  
2NTwhat's the other suit? (may be an invitational raise)
3 ♣weak to play
3 ♠ weak, pre-emptive
3NTSerious
4 ♣ Cue
4 ♠ weak pre-emptive

Continuation Over 2NT 
3 ♣ requests suits to be bid in ascending order
3 transfer to 's (reply may be passed), transfer may be broken
3 transfer to ♠ 's (reply may be passed), transfer may be broken
3 ♠ shows at least 5/4 in the minors slam interest
3NT natural, to play
4 ♣ gerber


No weak take out, as such, exists over 2NT
Transfers can be broken either with a cuebid or with a jump completion.

Responding to our opening 3 level and higher bids
Essentially natural with jump shifts being cue bids.
New suits are a one round force and in the first instance show tolerance for pre-emptor's suit, if responders suit is repeated then no tolerance is implied.