Every public utility and affiliate through the public utility shall provide the board with access to books, records, accounts, documents, and other data and information which the board finds necessary to effectively implement and effectuate the provisions of this chapter.

 The board may require affiliates of a public utility to keep separate records and the board may provide for the examination and inspection of the books, accounts, papers, and records, as may be necessary to enforce this chapter.

 The board may inquire as to and prescribe, for ratemaking purposes, the allocation of capitalization, earnings, debts, and expenses related to ownership, operation, or management of affiliates.