Conn. Gen. Stat. § 49-31c: When subordination not subject to statute of frauds and automatically effective.

A subordination agreement which provides that a mortgage, lease or other interest in real property shall be subordinated to one or more future mortgages is not subject to the provisions of section 52-550 and is valid and binding notwithstanding that the subordination agreement does not contain any of the terms or provisions of the future mortgage or mortgages. If the subordination agreement so provides, the subordination is automatically effective at such time or times as the future mortgage or mortgages come into existence without the necessity for the subordinating party to execute any further instruments, provided the mortgage does not violate the terms of the original subordination agreement.