N.Y.C. Charter § 273-a: Section 273-a. Transit unification sinking fund of the city of New York.

There is hereby continued the fund known as the "transit unification sinking fund of the city of New York" which shall have for its purpose the amortization and redemption of all corporate stock of the city of New York issued on and after the first day of January, nineteen hundred thirty-nine, for transit unification purposes.