A Commission of Inquiry has been ordered to look into the behaviour of Fiame Naomi Mata'afa, who recently left the governing HRPP, as well as La'auli Leuatea Polataivao Schmidt, Faumuina Wayne Fong, and Olo Fiti Vaai.
Prime Minister Tuila'epa Sa'ilele Malielegaoi ordered the commission during the last day of Parliament, before next month's election.
He said the four MPs attended political campaigns in several constituencies without informing the Speaker.
