The layout of commissioning is based around design-bid-build model and not an integrative design or design-build delivery. This creates either a loophole or exception for achieving the prereq. Consider addressing different delivery methods up front in LEED.

The credit seems to encourage hiring the Cx earlier in the project and keeping them on later. Consider requiring an executed contract before the end of programming phase to ensure this message gets to the client. Similar to the contract being required through post-acceptance.

Qualifications should consider certification bodies that are trying to ensure quality commissioning agents such as ASHRAE, BCA, ACG, TABB, NEBB, etc.