It's not a problem. That's the mindset we need to move to management resources, not only cash. So a loans portfolio is as important as a fixed asset. Cultural change is important, but it's not done overnight.
On the estimate of cost, when you talk to the consultant, it's a very high-level estimate. It could be $150 million. It's going to depend on the system we need, because we still need to track cash. We also need to track the accrual basis and we need to compare the numbers. It's going to take a lot of training and retraining some of our financial officers who have been used to managing cash. It's a new process with new routines that will need to be done. It's going to take some time. So $150 million is a high-level estimate.
On the timing, if we implement this approach, our recommendation is that we do it at the same time as we do the implementation of the other policies, on the results and structure and also the PAA to make sure we have changes at the same time, so it's comprehensive.
If you look at page 15, it gives you an idea in terms of the complexity and why it's so complex. If you do a little algebra, going back to your x and y axes, on the y axis you have six different approaches; on the x axis you have five different approaches. It's not something that has only one way. Different countries have used different approaches. Australia, for example, went to the sixth, full-cost appropriation, and then they retrenched back to something closer to the fourth. They experimented with something that was not right. We have to be careful in picking and choosing to find the winning solution.
If I were making a guess in terms of what would be the sweet spot for the Government of Canada over the long term, I would say probably 5.4 would not be a bad place to land, but it's going to take a bit of time. It would be government-wide, and it would be the accrual appropriation and financial statements. That would be a good place to land.
But you can see we have from one to six. These are different models. I'm sorry, I'd like to make it simpler, but these are the different approaches that are available on the market at the moment. They are available for different countries, different provinces. You can have from government-wide only to government-wide and all departments. I'm sorry, but it's not easy.
Moving to page 16, the notional implementation plan, we asked our consultants if they could give us an idea in terms of how much it would take and what major steps would be involved. They recommended that it would probably take something like 60 months to go to the full solution. There would be intermediate checkpoints to make sure we're on the right track and that parliamentarians feel comfortable with the information being presented. Again, page 15 tells us it is complex, and page 16 tells us it's going to take some time, and a bit of patience will be required from parliamentarians to move along to the solution.
On page 17, the study's conclusion, although the increasing use of accrual accounting is a technical accounting change, it could have a significant impact on people, process, and systems. Therefore, if we're going to go there, how we go there is also very important. It's important that you have the right information throughout the transformation.
We also need to know where you want to go in terms of what information will satisfy you to hold the government to account. I think it's a two-way street. We can give you some information, but we'll also be depending on you to provide us with some guidance in terms of what would be useful to you.
On page 18, the last point, what we will be proposing is a made-in-Canada design framework. We have some specific issues that we deal with in Canada that the provinces don't deal with to the same extent. I'm talking about environmental liability. When I was looking at the public accounts, I saw that we have something like $5 billion to $6 billion of environmental liability. Provinces normally do not have large amounts of environmental liability. I think it would be important for Parliament to recognize the liability, but also parliamentarians have to tell us the pace at which they want this liability to be discharged. We have to reconcile those two pieces of information.
I think I will conclude on this note.