TRENTON, N.J. (AP) — Public worker unions are preparing their response to claims from Gov. Chris Christie’s administration that a judge “fabricated” a right to pension contributions at a certain level.

A legal filing due Monday to the state Supreme Court is the latest in a string of court filings over Christie’s decision not to contribute to public workers’ pensions at the level planned in a 2011 law he signed.

READ MORE: Burlington County Double Shooting Leaves Teenager Dead, Another Injured

The governor says the state does not have enough money to make up so quickly for years of skipped or skimped payments.

READ MORE: Supply Chain Issues: 'There Really Are Problems Everywhere,' Even For Small Companies

But unions say the state has a contractual obligation and the pension funds are in danger of running out of money if the payments are not made up.

Arguments in the case are scheduled for next month.

MORE NEWS: 2 Suspects In Custody After Shooting Near Lincoln High School Left Man Killed, 16-Year-Old In Critical Condition, Police Say

(© Copyright 2015 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)