If the contract provides for construction of any portion of the distribution system by the owner or owners, chapter 9, title 43, Idaho Code, shall not be applicable to that portion of the construction. If any portion of the distribution system is to be constructed by the district, the district shall comply with the provisions of chapter 9, title 43, Idaho Code, insofar as applicable to the construction to be performed by the district or by a contractor under a separate contract with the district, unless the owner or owners furnish a written waiver of such compliance.