The bureau shall, subject to the provisions of Sections 25-53-101 through 25-53-125, have sole authority and responsibility for defining the specific telecommunications equipment, systems and related services to which the provisions of Sections 25-53-101 through 25-53-125 shall be applicable. However, the provisions of Sections 25-53-101 through 25-53-125 shall not be applicable with respect to computer and telecommunications equipment, systems and related services that are only available from a sole source.