For purposes of this section, fiscal quarter shall mean the three-month period beginning January first, April first, July first or October first, and monthly debt service shall mean, as of any date of computation, the amount of monies equal to the aggregate of (i) all interest payable during such month on bonds and notes of the city, plus (ii) the amount of principal (including payments into sinking funds) maturing or otherwise coming due during such month on all bonds of the city (excluding principal payments made from sinking funds required by the terms of certain city bonds), plus (iii) the amount of principal to be paid on notes of the city during such month from sources other than the proceeds of bonds or renewal notes (exclusive of revenue anticipation notes and tax anticipation notes or renewals thereof issued less than two years prior to the date of computation).
N.Y. City of Troy Issuance of Serial Bonds Law § 8-a