As I alluded to previously, there are times when there is a procurement process and we will ask for certain levels of IT skills. Even in architecture and engineering projects, for instance, we will actually see that a team is proposed, and then, for a number of reasons.... There can be a delay between the time the contract is awarded and when the work is actually undertaken and, in that time, certain of those resources are no longer available. In some cases, people will actually leave firms and the firm has to replace them. In other cases, the firm isn't sure that they've won, and they may deploy those resources to another project.
In those cases, they would be required to submit for approval by the government alternative resources. They would have to demonstrate that they meet the same skill or have more capability than those who were originally proposed.