Subject to the process in RCW 39.10.270 or 39.10.280, public bodies may utilize the general contractor/construction manager procedure for public works projects where at least one of the following is met:
(1) Implementation of the project involves complex scheduling, phasing, or coordination;
(2) The project involves construction at an occupied facility which must continue to operate during construction;
(3) The involvement of the general contractor/construction manager during the design stage is critical to the success of the project;
(4) The project encompasses a complex or technical work environment;
(5) The project requires specialized work on a building that has historic significance; or
(6) The project is, and the public body elects to procure the project as, a heavy civil construction project. However, no provision of this chapter pertaining to a heavy civil construction project applies unless the public body expressly elects to procure the project as a heavy civil construction project.