The legislation ordering the return of post workers was handed over to the House of Commons during a special session that sank into the hours of Saturday morning.
Bill C-89 adopted a third reading with a vote of 166 to 43.
Now the senator is expected to sit on Saturday and, if necessary, on Sunday, to deal with the bill that will come into force at noon in the eastern part of the day following the royal agreement.
The legislative impetus came as Ottawa, as well as the smaller cities of Ontario and British Columbia, and Sherbrooke, KY, became the latest targets for the rotation strikes of the Canadian Union of Postal Workers.
Despite the hurry to adopt the legislation, Labor Minister Patti Haydu encouraged Canada's post and CUPW to remain at the negotiating table.
"They can still make a deal," she said.
He added: "Obviously, we would prefer the parties to be able to negotiate a general agreement, but the time has come for us to be ready to take action if they can not."
Haidou refers to the delivery of mail as a "basic service" and said small businesses relying on the postal service to deliver their goods during the busy Christmas season may fail if the situation is not quickly eliminated.
"And when I say a small one, I mean very small, I mean people who know that they sell marmalade or handmade goods that this is the most profitable time of their year and if they can not make their profits at this time of year, they can very well face the end of their business. "
The NAP, the working leaders hit the bill
New Democracy Labor Chiefs and Deputies broke the government to undermine the collective bargaining process. The government has removed all incentives for Canadian mail to reach a negotiated settlement now that the agency knows workers will be reinstated by the beginning of next week, they accused.
"The right to strike is an integral part of the collective bargaining process," said Canadian Labor Congress President Hassan Jusuf. "Without it, the employer has no incentive to bargain in good faith, and workers have no opportunity to demand a fair trial."
Canada's post seems to convince Prime Minister Justin Trudo that Christmas will not come without a bill to return to work, added CUPW President Mike Plechek.
"Mail was moving and people knew it," he said. "People get their mail and their online orders, that's the purpose of our rotation stack, not to fight the public."
NDP leader Jiangmeh Singh accused the liberals of hypocrisy, relying on a belief in the right to collective bargaining, while at the same time bringing what he called "the worst, most draconian" legislation to return to work.
"They showed their true face … that this government is not a friend of the working people," Singh said.
New Democrat MPs voted against the proposal to speed up the debate on legislation on work, many of them making a show of leaving the parliament after the vote, raising their fists with a greeting to the post workers who watch the public gallery. The voices of those who left the city were not counted.
Six new MEPs stayed in the hall – a representative of the small number the party supported, would have a chance to speak during the next fast-track debate on the bill.
CUPW argues that the bill is unconstitutional and threatens to challenge it in court.
The Union has won a legal challenge against the re-employment legislation imposed on postal workers in 2011 by the previous conservative government. The court ruled in 2016 that by abolishing the right of workers to strike, the bill violated their right to freedom of association and expression.
Haidou claims that her bill is "dramatically different" from the "hard hands" approach adopted by the Harper Government, and takes into account the concerns of both the Union and Canada.
But two independent senators, Francis Lankin and Diane Griffin, wrote Haidou to express concern that the bill may not be constitutional. The two have said that Haidou has promised to give a governmental analysis detailing how the bill violates the Charter of Rights and Freedoms, but has not yet taken place until Friday night.
Watch: The Canadian Post Strike in Monton
CUPW members rotate for one month, causing huge delays in unsorted mail and packets at post offices, although Canada Pose and the Union are questioning how big a stick is.
The Canadian Post says it can take weeks to go even further in 2019 to clear up the chaos, especially in the big sorting centers in Toronto, Montreal and Vancouver.
50,000 members of the CUPW, in two groups, insist on better pay for rural and suburban carriers, more workplace security and minimum guaranteed working hours.