4NT:

Indicate the type of 4NT slam try that you use. Mark the appropriate box even if you frequently use a bid other than 4NT to ask for aces/key cards.

Blackwood:

Check this box if you use regular Blackwood with standard responses
(5 shows 0 or 4 aces, 5 shows 1 ace, 5 shows 2 aces, and 5 shows 3 aces).

RKC:

Check this box if you use Roman Key Card Blackwood with the king of trump counting as an extra "ace". 5 shows 0 or 3 aces, 5 shows 1 or 4 aces, 5 shows 2 or 5 aces without the queen of trump, and 5 shows 2 or 5 aces with the queen of trump. Remember to not alert this bid, but to explain it after the face-down opening lead.

1430:

Check this box if you invert the first two responses to Roman Key Card Blackwood with
5 showing 1 or 4 aces and,
5 showing 0 or 3 aces.

If you use Roman Blackwood (shows only aces, and shows which two of four aces are held), or declarative-interrogative (where 4NT is a general slam try), or Culbertson or any other use of 4NT, describe the 4NT variation on one of the blank lines in this section.

Also use these lines to indicate special ace-asking bids used: "Kickback" means that four of the suit over your trump suit is used as Roman Key Card (4 when hearts are trump, 4 when clubs are trump, etc). "Redwood" means that 4 or 4 can be used as Roman Key Card, the suit not in focus as a trump suit. If a raise to four of a minor is used as RKCB or for other understandings, indicate it here. There should be sufficient room to write an explanation of what you are playing rather than just "Kickback" or "Redwood".

vs Interference:

Check the appropriate box if you have any special ace-showing responses over interference over 4 or 4NT.

DOPI

means that double shows zero aces/keycards, and pass shows 1 ace/keycard, etc.

DEPO

means that double shows even number of aces/key cards while pass shows odd number of aces/key cards.

Level:

On this line indicate the level at which you play DOPI and DEPO. For example: "DOPI@5 lvl, DEPO@6 lvl".

ROPI