I posted this because I may have created a BIT problem for partner. I was the 4NT bidder, and I broke tempo before bidding 5♠. My hand was 9xx-Kx-AKxx-AKTx.
I carelessly thought that partner may have zero KCs. But then he opened with no As or Ks. Could I ...
On the ACBL website there is a document entitled "All Events General Conditions of Contest". On p. 3, item 4 under Play states, "A pair must have a carding agreement listed on their convention cards."
The 2013 version of this document was more expansive, but essentially said the same thing.