Council of Fifty minutes from March 11, 1844 records official organization and mentions establishing a theocracy.
Council of Fifty, Minutes, March 1844–January 1846; Volume 1, 10 March 1844–1 March 1845, p. 25, The Joseph Smith Papers
Monday March 11th. 1844
The council met in the room over brother Henry <W> Millers house at 9 o clock A.M. The brethren continued to express their views on the foregoing subjects and many others of importance. All seemed agreed to look to some place where we can go and establish a Theocracy either in Texas or Oregon or somewhere in California &c. The brethren spoke very warmly on the subject, and also on the subject of forming a constitution which shall be according to the mind of God and erect it between the heavens and the earth where all nations might flow unto it. This was considered as a “standard” to the people an ensign to the nations &c.
E[lde]r Lucian Woodworth was very sanguine for the measure to be carried into effect. He said he had long desired it and now inasmuch as it had been proposed to organize this meeting into a council he was in favor of its being organized on an eternal principle after the order of God, every member of it to be bound to eternal secrecy as to what passed here, not to have the privilege of telling anything which might be talked of to any person even to our wives, and the man who broke the rule “should lose his cursed head”. He finally offered this as a resolution which was passed unanimously and became a law of the council. Prest. Joseph gave much instructions on many subjects & laid down the order of organization after the pattern of heaven. The following brethren being present they were all unanimously admitted members of the council to wit. President Joseph Smith was received as our standing chairman. Hyrum Smith, Brigham Young, Willard Richards, Parley P. Pratt, Orson Pratt, John Taylor, Heber C. Kimball, George A. Smith, Wm W. Phelps, Lucian Woodworth, George Miller, Alexander Badlam, Peter Haws, Erastus Snow, Reynolds Cahoon, Amos Fielding, Alpheus Cutler, Levi Richards[,] Newel K. Whitney, John M. Bernhisel, Lorenzo D. Wasson and Wm Clayton. These brethren were all seated in order according to their ages the oldest member being seated at the right hand of the chairman and forming a semicircle in front of the chair the youngest member seated at the left of the chairman. Whenever any resolution was offered to the council all the members had to vote viva voce beginning at the oldest and on down to the youngest. Willard Richards was appointed Recorder and Wm Clayton Clerk. After this organization and all having taken their seats the chairman continued his instructions. He said it was universally necessary before any resolution could become a law to have the vote of all the members of the council unless some of the members should be absent on business for the council. The most perfect harmony prevailed during the whole of this council and the brethren all feel as though the day of our deliverance was at hand. <see March 19. close of minutes>