Complex sentence: At the time, the same parliament that had adopted the Nickle Resolution was still in session, and which, had it had any binding nature, would have been in effect at least until the dissolution of the 13th parliament on 14 October 1921.
Split into simpler sentences: At the time, the same parliament that had adopted the Nickle Resolution was still in session. It follows that such a resolution, had it had any binding nature, would have been in effect at least until the dissolution of the 13th parliament on 14 October 1921.