sentences:  The reason was seen in a new set of rules that were adopted under the Organic Law on Political Parties and Candidates (OLIPPAC) that had as a central aims to.promoted party identification and to curb short term opportunistic behaviour among MPSs.A major new rule proscribing MPs from changing party affiliation during a parliamentary period.However, the prime minister retained the power to change his cabinet and as result this apparent stability was glossed over sharp conflicts in the government.