The sender and receiver must speak the same language. The sender must have foreknowledge of the code, how it will decoded by the receiver. Hence, the foreknowledge.
Again, the Wimmer experiment like Szostak's planned experiment (according to his bio) - began with the message. The code was presupposed along with autonomy and information (Shannon, successful communication.)
The question remains whether chemical evolution can lead to a genome based replicator. So far it's all been pre-game show and the associated trash talk. I'm looking forward to the game, which will take place in the laboratory.
My problem with ID and related criticisms of evolution is that they have downplayed or dismissed the need to test hypotheses.