Prime Minister Fiame Naomi Mata'afa said this was included in the FAST manifesto for the 2021 General Election
Parliament has approved 250,000 tālā to fund a review of the Constitution, the first in 60 years.
Fiame says the five-year term was an original provision from the beginning of the Constitution.
But the Head of State can be removed at any time by a two thirds majority vote of Parliament.
Samoa's first Head of State was a joint appointment of Tupua Tamasese Meaole and Malietoa Tanumafili II, who were appointed for life.
