Mo. Rev. Stat. § 8.677: Construction management services to be used when.

The appropriate officer, board or agency of a public owner may elect to engage the construction management services of a construction manager when planning, designing and constructing a building or structure or when improving, altering or repairing a building or structure. Construction management services may be used by the public owner in the preconstruction phase or the construction phase of public works project or in both phases of the project.