https://marco.org/2008/01/23/a-sheet-of-instructions-provided-by-the-clinton
A sheet of instructions provided by the Clinton campaign to its precinct works captures its program for the Caucus: “It’s not illegal unless they [the temporary precinct chairs] tell you so.” This certainly suggests that, for the Clinton campaign, the operative standard of conduct was, simply and only, what it could get away with.
— [PDF] The Obama Campaign’s Formal Complaint regarding irregularities in the Nevada caucus (thanks, Dan)