; applicability The amendment made by subsection (a) shall apply to any contract or other agreement between a covered entity, as defined in section 1349(a) of the National Flood Insurance Act of 1968, as added by subsection (a), and a Write Your Own company that is entered into on or after the date of enactment of this Act. 409. Easing proof of loss requirements Section 1312 of the National Flood Insurance Act of 1968 ( 42 U.S.C. 4019 ), as amended by section 406(a), is amended by adding at the end the following: (h) Proof of loss (1) Deadline for submission of supplemental proof of loss If a policyholder submits a proof of loss, or an equivalent submission, for a claim with respect to a policy for flood insurance coverage made available under this title by the deadline required under the standard flood insurance policy, the Administrator may not deny payment for any supplemental proof of loss submitted for flood damage sustained from the same flood event on the basis that the policyholder failed to include the flood damages on the initial proof of loss. (2) Effect of signature on proof of loss If a policyholder of a policy for flood insurance coverage made available under this title signs an initial or supplemental proof of loss described in paragraph (1), that act of signing may not preclude the policyholder from making supplemental claims to, or otherwise amending, the initial proof of loss. (i) No condition of payment Notwithstanding any other provision of law, or any term or condition of a standard flood insurance policy, the Administrator may not condition payment of an undisputed claim based on the submission of a signed and sworn to proof of loss. . 410. Deadline for claim processing (a) In general Section 1312 of the National Flood Insurance Act of 1968 ( 42 U.S.C. 4019 ), as amended by section 409, is amended by adding at the end the following: (j) Deadline for approval of claims (1) In general The Administrator shall provide that, in the case of a claim for damage to or loss of property that is covered