The opposition Cook Islands Party, the CIP, says a law to stop MPs from changing parties will be one of its priorities if it wins this month's general election.
Both main parties contesting the election have made proposals to end the practice of MPs going from one party to another.
The CIP has released its updated manifesto and the paryt's vice president, Nick Henry, says the party has come up with an anti-party hopping policy.
"What we are trying to do it is to not only legislate it in the electoral act, but also if we manage to a two third majority in parliament then we want to put that into the constitution."
Nick Henry says employment is also another issue the party is concerned about.