The rules are subject to change every election cycle and are determined by the Republican National Convention prior to the convention date. An example of this is Rule 40b of the RNC which was in effect in 2012, but was not adopted for the 2016 convention in Cleveland. Under this rule, a candidate must have the support of a majority of the delegates of at least eight states in order to get the nomination. Rule 40e then states that if no candidate has received the majority of votes, "the chairman of the convention shall direct the roll of the states be called again and shall repeat the calling of the roll until a candidate shall have received a majority of the votes."