OTTAWA -- The federal government is telling the Supreme Court of Canada there is no reason to review a decision that affirmed the constitutionality of a pact between Ottawa and Washington on asylum seekers.

In a submission to the high court, government lawyers say the Federal Court of Appeal correctly interpreted the law, leaving no issue of importance to clarify or resolve concerning the Safe Third Country Agreement.

Refugee claimants and their advocates say the case deserves the Supreme Court's attention because it raises key questions about access to remedies for violations of the Charter of Rights and Freedoms.

The high court is expected to decide in coming weeks whether to hear the case, helping decide the fate of the 17-year-old refugee pact.

Under the agreement, Canada and the United States recognize each other as safe places to seek protection.

It means Canada can turn back potential refugees who arrive at land ports of entry along the Canada-U.S. border on the basis they must pursue their claims in the U.S., the country where they first arrived.

Canadian refugee advocates have steadfastly opposed the asylum agreement, arguing the U.S. is not always a safe country for people fleeing persecution.

Several refugee claimants took the case to Federal Court along with the Canadian Council for Refugees, the Canadian Council of Churches and Amnesty International, who participated in the proceedings as public interest parties.

In each case, the applicants, who are citizens of El Salvador, Ethiopia and Syria, arrived at a Canadian land entry port from the U.S. and sought refugee protection.

They argued in court that by returning ineligible refugee claimants to the U.S., Canada exposes them to risks in the form of detention and other rights violations.

In her decision last year, Federal Court Justice Ann Marie McDonald concluded the Safe Third Country Agreement results in ineligible claimants being imprisoned by U.S. authorities.

Detention and the consequences flowing from it are "inconsistent with the spirit and objective" of the refugee agreement and amount to a violation of the rights guaranteed by Section 7 of the charter, she wrote.

"The evidence clearly demonstrates that those returned to the U.S. by Canadian officials are detained as a penalty."

However, the Federal Court of Appeal overturned the decision earlier this year.

"The alleged constitutional defect in this case stems from how administrators and officials are operating the legislative scheme, not the legislative scheme itself," the appeal court said.

"But because the claimants chose not to attack any administrative conduct, we have neither the ability nor the evidence before us to assess it."

The appeal court also found the legislative regime consistent with the charter unless the treatment experienced by those sent back to the U.S. could be shown to "shock the conscience."

In their application to the Supreme Court, the claimants and their advocates say the effect of the decision is to insulate the Safe Third Country regime from constitutional review "and to erect major obstacles to constitutional scrutiny of federal legislation generally."

Federal lawyers, however, argue the appeal court correctly observed that the "shocks the conscience" threshold is high.

"Practices that have been found to violate that threshold include torture, stoning, mutilation and the death penalty," the government submission says.

Removal to the U.S. to make an asylum claim under conditions similar to those in Canada "is not such a practice, with the U.S. system providing full participatory rights, multiple avenues of appeal, and a non-mandatory risk of detention."

The Supreme Court should decline to hear the case, the government concludes.

"The proposed appeal does not raise any issue of public importance, nor does it raise any issue of law that ought to be decided by this Court."

This report by The Canadian Press was first published Oct. 5, 2021.