The Bank Secrecy Act carries with it an enormous amount of different regulations and different laws and different penalties. The exact part is what you need to make your "point". If you can't produce it, no point has been made.
The DOJ hasn't bothered to produce any reason to throw executives in jail, and I bet you can't either. Blithe self-righteousness is not a reason. A vague reference to a multi-hundred-page set of laws and regulations is not a reason.
New York State Penal Law Sections 175.05 and 175.10
edit - 175.10, which HSBC have admitted guilt to, is a class E felony in NY, which apparently has sentencing guidelines of up to four years in prison with a minimum of one year.
It's not at all uncommon for prosecutors to say things like that and then not file charges because they know they can't get a conviction.