They were among a group of 14 MPs who were jailed on bribery and corruptions charges in 2015.
The men are Marcellino Pipite, Silas Yatan, John Amos, Tony Nari, Jonas James and Thomas Laken.
After being found guilty of the bribery charges in 2015, Pipite, who was speaker of parliament, used his temporary powers as acting president to pardon himself and the others.
That decision was subsequently overturned by the president, Baldwin Lonsdale, and ten of the group, as well as a lawyer, were later found guilty of conspiring to defeat the course of justice.
