Per the Master Credit Facility AgreementMaster Credit Facility AgreementAgreement evidencing the terms and conditions of a Credit Facility. , the ratio (expressed as a percentage) of the aggregate Net Cash FlowNet Cash FlowAt underwriting or for any specified period, the amount calculated per Part II, Chapter 2: Valuation and Income, Section 203: Income Analysis and the applicable products and features in Part III. for the Mortgage Properties to the Facility Debt Service.