The two governments will each provide $C 16m ($US 12.6m) to develop the business case for the $C3.9bn extension, while Quebec will invest a further $C 330m to take the project forward. These funds will enable the launch of property acquisition; development of technical specifications; completion of a new project value analysis; an independent review of costs, risks and the implementation timeline; and establishment of a project office.

The final division of costs between the federal and provincial governments will be determined following the completion of the business case.

Subject to the finalisation of funding, the five-station extension is expected to open in 2026.