Public contracts: change orders.

Existing law contains various provisions relating to contracts by a public entity for the performance of public works of improvement, including provisions for the payment of progress payments and the disbursing and withholding of retention proceeds. Existing law, until January 1, 2016, prohibits progress payments upon state contracts from being made in excess of 100% of the percentage of actual work completed, and authorizes the Department of General Services to withhold not more than 5% of the contract price until final completion and acceptance of the project, except as specified.