The supreme court has ruled (IIRC 189?) that a judge does not have to inform the jury of their rights to exercise Jury Nullification. The prosecution is certainly not going to mention it. Woe be to the defense council that mentions it. The basic rights and intention of a jury as meant to be by our founding fathers was that a juror is trusted with not only judging the accused, but the laws they are being tried under. IF you do exercise J.N. DO NOT tell anyone in so many words. The case will be retried with a different "stacked jury", what do you really think the questions are for? I of course would never exercise it in cases where someone was attacked, robbed, or done wrong, or any other heinous crime. If someone was defending themselves or family with deadly force I would not convict them. I would however in the case of fed or local gov't, where they were exceeding the Constitution vote not guilty and reply with "I did not think there was sufficient evidence for a guilty vote". Lawyers will more often than not tell you you cannot do it, it throws a wrench into their game and allows you/us to intrude into their domain of insuring our compliance. A judge will instruct the jury that they have to judge their case according to the written letter of the law. This is a lie and false instruction. when a judge tells a jury to disregard statement or testimony that a juror thinks is prudent to the case that is also false and a lie. A judge can be just as guilty as anyone else for witholding evidence that is deemed necessary to the case. There are two good articles at backwoods home .com in the left column under articles.
Jury Nullification IS as American as baseball and apple pie. It was used in colonial America to free patriots from tyrannical crown rule.
Attorneys and judges are only interested in a good conviction record. That is what is necessary for them to advance. Our court/legal system is good when viewed at its base and meaning. Like gov't it has been corrupted, into the dept that insures tyranny will stay in place.
In short, anytime you feel a law is unconstitutional, unfair, oppresive or tyrannical you can vote not guilty. Enough votes like that and the law will quit being used.I have been researching and trying to learn about it for a couple years now as I still consider myself a student even to the Constitution. Also Courts will try to tri under admirlty law as well but I am still working on that one.I am by no means an expert. Good luck in your studies.