All the third-party services were to have a cap, which is commonly known as the ceiling price. That is what the government would pay for those services they had to pay for through the contractor. If the third-party supplier charged more than that, then either the relocation management company had to eat the difference, or in this case the employee would have to eat the difference. This ceiling rate was imposed to protect the transferred employee.
On January 29th, 2007. See this statement in context.