Well-structured PPP contracts build in adjustment mechanisms for dealing with the more common types of 'unexpected' change, as described in Section 3.4.3: Adjustment Mechanisms. In addition to being aware of, and following, the rules in the contract, contract managers need to make sure required institutional elements are in place, as described in the EPEC Guide to Guidance [#83, pages 37-38]. For example, this could include ensuring expert panels have been identified and are qualified, and all the steps are clear to all parties involved.