Canon of Laws was a law used by the Sikarians to prevent alien cultures from using their technology. It was similar to the Prime Directive, used by the United Federation of Planets.

In 2371, the USS Voyager attempted to acquire a spatial trajector from the Sikarians in an attempt to shorten their journey back to the Alpha Quadrant. Unfortunately, the Sikarian magistrate, Gathorel Labin, denied Captain Kathryn Janeway's request, as it would have violated their Canon of Laws. (VOY: "Prime Factors")