BN coalition members are obliged to resign as an MP if they are expelled from their respective parties.br br This was part of a bai'ah (oath of allegiance) that BN candidates had to publicly take at a ceremony at the coalition headquarters in Kuala Lumpur last night.br br Non-Muslim BN component party members also appeared to have taken the oath.br br Recent amendments to the Federal Constitution stipulated that MPs who switch parties mid-term or become an independent will be forced to vacate their seat.