We have a larger proportion of longer-term agreements now than we did in the past through our modernization efforts with respect to advance contribution. We can have agreements for up to three years, but as Ms. Tapley indicated, it does depend on the project and it does depend on the risk of the service provider organization.
We have what we call a funding risk assessment model. That helps us determine the risk of the agreement we're entering into. That also helps us determine the number of financial and activity monitors that are needed across the life of the agreement, but it also informs the length of the agreement to an extent.