; and (II) 30 percent of the adjusted gross income of the household for the year; and (ii) the sum of— (I) the cost of premiums for the household for flood insurance under the national flood insurance program for the year; and (II) principal and interest payments for the household for the year for a loan provided under this section. (3) Relationships with other agencies The Administrator may enter into a memorandum of understanding with the head of any other Federal agency to administer the provision of loans under paragraph (2)(A). (4) Use of discount rate in calculation The Administrator shall calculate the amounts under paragraph (1)(B) using a discount rate of 3 percent. . 104. Coverage expansion (a) In general Section 1306(b) of the National Flood Insurance Act of 1968 ( 42 U.S.C. 4013(b) ) is amended— (1) in paragraph (2), by striking $250,000 and inserting $500,000 ; and (2) in paragraph (4), by striking applicable) of $500,000 and inserting applicable) of $1,500,000 . (b) Rule of construction Notwithstanding section 102 of the Flood Disaster Protection Act of 1973 ( 42 U.S.C. 4012a ), nothing in the amendments made by subsection (a) may be construed as requiring a person to obtain flood insurance in an amount that is greater than the amount of flood insurance held by that person on the day before the date of enactment of this Act. 105. Additional coverage for business interruption (a) In general The Administrator shall conduct a study on the feasibility and soundness of offering coverage for interruption business losses caused by a flood under the National Flood Insurance Program (referred to in this section as business interruption coverage ). (b) Contents In conducting the study under subsection (a), the Administrator shall, at a minimum— (1) evaluate insurance industry best practices for offering business interruption coverage, including the types of coverage provided and the utilization rate