(b) The determination shall be provided in writing, within thirty
business days of the date of the complaint or receipt of information or
owner's request, to the customer, the owner, any other tenants receiving
service measured by the shared meter, and any other utility providing
service to such customer through such meter. Such written determination
shall include a description of the specific areas outside the dwelling
served by the shared meter, the nature of the uses of the service, and
the proportional amount of service registered on the shared meter that
is provided to the shared meter customer's dwelling and to areas outside
the dwelling. A notice shall be included with the determination
informing the recipients of the availability of the commission's
complaint handling procedures, and providing the department's address
and telephone number for filing objections to such determination.