As outlined in yesterday’s instalment of Process Nerd, what happens in the House today could determine when the now imminent summer recess officially gets underway. It’s the last designated supply day of the current financial cycle, which means MPs will have to sign off on the latest batch of main estimates before the sitting day can be officially wrapped up.

Process Nerd: What must happen before the House can rise for the summer?

In a now familiar move, the Conservatives have served notice of nearly 400 motions to oppose specific line-item requests, which could, in theory, result in a marathon voting session — one that could conceivably not only continue through the night, but well into the next day.

So far, they’ve been uncharacteristically quiet about their plans — in the past, the party has gone out of its way to highlight the potential for such procedural protest maneuvers, which could indicate that they’re not yet prepared to pull the trigger and force up to 100 hours of votes.

Then again, they may be playing their cards close to their collective chest as part of the traditional end-of-sitting negotiations between House leaders, which means there’s no way to be sure just how tonight’s proceedings will play out until the question is called.

In the meantime, it is, as noted, the final supply day of the sitting, which means the Conservatives will have one more opportunity to make the case against the federal carbon tax, which, they will contend as per the wording of the motion, “will not reduce emissions at its current rate and it is already making life more expensive for Canadians,” and that the House should “call on the government to repeal” it, and “replace it with a real environment plan.”

Depending on what happens during the estimates vote, MPs — or, at least, those on evening House duty — could also continue the debate on the government’s proposed response to the Senate amendments to the proposed BC offshore tanker ban, as well as the Upper House-recommended tweaks to the proposed overhaul of the access to information regime, both of which are now under threat of both time allocation and closure.

Also back on the Commons to-list: Another round of second-reading debate on the proposal to ratify the new North American free trade deal, which, as per the time allocation motion passed last week, has five more hours on the clock before it has to be put to a preliminary vote.

ON & AROUND THE HILL

A coalition of public health groups mount a last-ditch campaign for the Senate to hold a final vote on Sen. Nancy Greene Raine’s bid to ban food and beverage advertising targeting children, which has been languishing in Upper House limbo since the House signed off on the original bill in September. (10 a.m.)

The Parliamentary Budget Office releases a new report that examines “federal program spending on housing affordability.” (10 a.m.)

Liberal MP Omar Alghabra and Sen. Salma Ataullahjan team up with the Muslim Welfare Centre of Toronto and Project Ramadan to host a “food basket build” to assemble packages to “distribute to those in need within the Ottawa community” as part of an ongoing effort to “raise awareness about food insecurity in Canada.” (9:30 a.m.)

OUTSIDE THE PRECINCT

Liberal MP Steven MacKinnon joins Library and Archives Canada head Guy Berthiaume at the Gatineau Preservation Centre for what the advisory is billing as a “major announcement on the design of the first federal net zero carbon facility.” (10:30 a.m.)

Finally, the Office of the Auditor General delivers its report on Kindergarten through Grade 12 Education in Yukon to the Yukon Legislative Assembly.

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