Yes, hence the term "By-laws", as in this is how the club will operate, by the law.
And the DNC's by-laws state that they will conduct fair and open primaries, not favoring any candidate, etc. But because the DNC cheated for Hillary (see WikiLeaks emails), those that contributed $$$$ to Bernie we're defrauded.
And yes, like the DWS computer scam the media silence is deafening.