 Calles could not immediately stand for election, so there needed to be a solution to the crisis.Revolutionary generals and others in the power elite agreed that congress should appoint an interim president and new elections held in 1928.In his final address to congress on 1 September 1928, President Calles declared the end of strong man rule, a ban on Mexican presidents serving again in that office, and that Mexico was now entering an age of rule by institutions and laws.