They might not have ever been specified in detail (eg. references to penal code), just in nature.
Here, Johnathan Turley describes:
"Merchan allowed the jury to find that the secondary offense was any of the three vaguely defined options. Even on the jury form, they did not have to specify which of the crimes were found. Under Merchan’s instruction, the jury could have split 4-4-4 on what occurred in the case. They could have seen a conspiracy to conceal a federal election violation, falsification of business records or taxation violations. We will never know. Worse yet, Trump will never know."
Here, by Elie Honig:
"So, to inflate the charges up to the
lowest-level felony (Class E, on a scale of Class A through E) – and to electroshock them back to life within the longer felony statute of limitations – the DA alleged that the falsification of business records was committed “with intent to commit another crime.” Here, according to prosecutors, the “another crime” is a
New York state election law violation, which in turn incorporates three separate “unlawful means”: federal campaign crimes, tax crimes, and falsification of still more documents. Inexcusably, the DA refused to specify what those unlawful means actually were – and the judge declined to force them to pony up – until right before closing arguments. So much for the Constitutional obligation to provide notice to the defendant of the accusations against him in advance of trial. (This, folks, is what indictments are for.)"