Highly doubtful assertion. Case in point: California has rather loose regs in terms of "medicinal" pot use but the feds don't. There have regularly been raids here and the local authorities could do nothing about that. Now I can't recall reading anything about pot in the constitution ;-)
As for your question in the other post, amendment 1, quote "Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances."
Freedom of speech means that the listeners also may not be unduly restricted from hearing such speech. The constitution is not meant to be a book the size of the tax code, that's why there are federal laws, regs, codes and so on that (should) take care of the details :-)