In the case of crime legislation changes, when this information is being discussed in a lead-up to a proposal--again on the executive side of government--the department would be asked to prepare financial projections along with the changes in legislation. There would be a policy proposal first put to a policy cabinet committee. This would include some financial information. If the policy was approved, then it would go to Treasury Board. Treasury Board would provide a front-end due diligence on the financial models, methodologies, and costings. Eventually it would become part of a budget, and then eventually Parliament would approve the appropriate financial authorities for the legislation.
On February 15th, 2011. See this statement in context.