The committee that oversees House of Commons spending says the Opposition New Democrats owe a “significant” sum for salaries improperly paid to aides who worked out of satellite party offices in Quebec.

Tuesday’s ruling is in addition the $1.17 million that the party was ordered to repay in June when the same committee ruled the NDP abused MP mailing privileges.

John Duncan, a Conservative MP and spokesman for the committee, says the latest dollar figure has yet to be determined, but he expects it to be a “significant number.”

Duncan said the rules are clear, and it’s also clear the NDP has broken those rules by using parliamentary resources to pay for offices that were not properly authorized.

He said Commons administrators are being asked to prepare various options to ensure the recovery of the funds.