(1) Applications for allocated cost of service and rate design changes shall
include the material required in ARM 38.5.103, 38.5.104, 38.5.109, 38.5.176 and
(2) Each allocated cost
of service and rate design application shall include an example and general
explanation of each current bill format that is used by the utility for
tariffed services. Copies of other billing information that are provided to
large groups of customers should also be provided and briefly explained.
Additional information may be provided at the discretion of the filing utility.
(3) Absent regular allocated
cost of service and rate design filings, a marginal cost of service study shall
be submitted to the commission for information purposes, minimally, every two
years. If the utility files an integrated resource plan with the commission,
cost information shall be submitted within six months following such filing,
unless the cost information has been presented within the previous two years.
At the time a marginal cost of service study is filed, the utility, at its own
option, may submit an embedded cost of service study.
(4) A marginal cost of
service study filed pursuant to this rule or in the context of a rate case must
contain current allocation factors.
(5) Three copies of the
letter of transmittal and three copies of all material required in ARM 38.5.176,
38.5.177 and 38.5.109 shall be filed with the commission at the time of
application. Montana consumer counsel shall receive two copies of the same
(6) All or any part of
the requirements of these rules may be waived by the commission upon a showing
of good cause. Waiver of any requirements, however, shall not preclude the
commission from requiring the filing of specific cost data and material
sufficient to support the application.