D.C. Mun. Regs. tit. 20, r. 20-6711
An owner using any of the mechanisms authorized under §§ 6706, 6708, or 6709 shall establish a standby trust fund when the mechanism is acquired.
The trustee of a standby trust fund shall be an entity that has the authority to act as a trustee and whose trust operations are examined and regulated by an agency of the federal government or the District of Columbia.
Each standby trust agreement shall be in the form prescribed by Appendix 67-8 (Trust Agreement), and shall be accompanied by the prescribed formal certification of acknowledgement.
The Department will instruct the trustee to refund the balance of the standby trust fund to the provider of financial assurance if the Department determines that no additional corrective action costs or third-party liability claims will occur as a result of a release covered by the financial assurance mechanism for which the standby trust fund was established.
An owner may establish a single trust fund as the depository mechanism for all funds assured in compliance with this chapter, including standby trust funds.
D.C. Mun. Regs. tit. 20, r. 20-6711