(1) The commission retains the right to examine project proposals as originally submitted by potential developers. The utility must keep all documents supplied by project bidders or on their behalf, and all documents created by the utility relating to each bid, for at least seven years from the close of the bidding process, or the conclusion of the utility's next general rate case, whichever is later.

(2) The utility must file with the commission and maintain on file for inspection at its place of business, the current rates, prices, and charges established in accordance with this chapter.