Section 8 provides that State authorities, in accordance with any guidelines issued by the Minister for Finance, either under this section or section 3(3), shall seek the advice of the agency as soon as is practicable before undertaking any public investment projects. The guidelines to be issued under this section can include issues relating to the type of project, the size of the project, the stage of development of the project, and other relevant factors which might determine whether the agency's advice should be sought on a project.