Is it permissible to trade in things forbidden by the state, even if they are not religiously prohibited, and is this considered an act of rebellion against the ruler?

The basic principle is the permissibility of trading in any permissible commodity, based on the Almighty's saying: "And Allah has permitted trade and forbidden interest," and the Prophet's (peace be upon him) saying: "Leave people; Allah provides for some of them through others." However, it is permissible for the ruler to prohibit trading in a permissible commodity if its sale leads to harm befalling the people, or if the benefit lies in its prohibition, as he has the right to restrict the permissible for a recognized public interest.