26 Del. Admin. Code § 3002-5.0
Notwithstanding any tariff provision or contract provision to the contrary, no covered utility shall terminate service during the heating or cooling season to any apartment complex, trailer park, or other grouping of individual residential dwelling units to which service is provided directly or indirectly through a master meter without individual meters, unless such utility has provided the notice required in §§ 5.2 and 5.3.
A written notice pursuant to § 5.1 shall be sent by First Class mail not less than fourteen (14) calendar days prior to the scheduled date of termination for non-payment to the owner of the premises affected or in lieu thereof, to the person, firm, or corporation to whom or which the last preceding bill has been rendered or from whom or which the covered utility has received payment. The content of such notice shall, at minimum, include the notification required by § 3.2.
The covered utility shall, at least ten (10) calendar days prior to termination for non-payment, provide notice to the occupants, which notice shall state the intended date of termination of service, the amount due for such service, and the procedure by which any tenant or public agency may make or guarantee such payment, and thereby avoid termination of service.
Such notice to occupants shall either be mailed by first class mail to the "occupant" of each dwelling unit in the building complex to which service is proposed to be terminated or posted in a conspicuous place or places at each building subject to termination, including common areas accessible to the utility.
Not less than fourteen (14) calendar days prior to termination of service to a multiple occupancy dwelling unit, the covered utility shall provide written notice of its intention to so terminate to the Public Service Commission of the State of Delaware, and to the Division of the Public Advocate.
26 Del. Admin. Code § 3002-5.0