The revelation directed fourteen pairs of elders, including Joseph Smith and Sidney Rigdon, to travel to Independence, Missouri. The missionaries were to "preach by the way" and to hold a conference upon their arrival. There was great interest in the Missouri mission since the New Jerusalem was to be identified. Joseph Smith and those traveling with him left Kirtland on 19 June 1831 and arrived in Independence in mid-July.
... The mission calls in verses 22 and 32 were later revoked.
[Cook, Lyndon, Revelations of the Prophet Joseph Smith: A Historical and Biographical Commentary of the Doctrine and Covenants, http://amzn.to/RevelationsofJosephSmith]