| (a) The commission has jurisdiction over affiliated
interests having transactions with utilities under the jurisdiction
of the commission to the extent of access to all accounts and records
of those affiliated interests relating to such transactions, including,
but not limited to, accounts and records of joint or general expenses,
any portion of which may be applicable to those transactions.
(b) The owner of a utility that supplies retail water
service may not contract to purchase wholesale water service from
an affiliated supplier for any part of that owner's systems unless:
(1) the wholesale service is provided for not more
than 90 days if service discontinuance or serious impairment in service
is imminent or has occurred; or
(2) the commission determines that the utility cannot
obtain wholesale water service from another source at a lower cost
than from the affiliate.
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