Multifamily Underwriting Standards identifying Pre-ReviewPre-ReviewRequirement that you obtain Fannie Mae’s approval before you Rate Lock a Mortgage Loan. Mortgage LoansMortgage LoansMortgage debt obligation evidenced, or when made will be evidenced, by the Loan Documents, or  a mortgage debt obligation with a Fannie Mae credit enhancement. and containing the underwriting requirements (e.g., debt service coverage ratio, loan to value ratio, interest only, underwriting floors, etc.) for all Mortgage LoansMortgage LoansMortgage debt obligation evidenced, or when made will be evidenced, by the Loan Documents, or  a mortgage debt obligation with a Fannie Mae credit enhancement. .