I take that to mean that the terms of any pensions can be changed every two years.
WHAT IT REALLY MEANS IS THAT all contracts are null and void AT THE END OF THE LEGISLATION SESSION THAT CREATED SAID CONTRACTS... period. None of them have to be honored or renewed EVER. Now if only we could find a way to make the US CONSTITUTION the LAW OF THE LAND, one that supercedes all other laws, we might have a chance