The holder shall require insurance policies to be procured and maintained in an amount sufficient to protect the security against the risks or hazards to which it may be subjected to the extent customary in the locality. All moneys received under such policies covering payment of insured losses shall be applied to restoration of the security or to the loan balance. Flood insurance will be required on any building or personal property securing a loan at any time during the term of the loan that such security is located in an area identified by the Federal Emergency Management Agency as having special flood hazards and in which flood insurance has been made available under the National Flood Insurance Act, as amended. The amount of flood insurance must be at least equal to the lesser of the outstanding principal balance of the loan or the maximum limit of coverage available for the particular type of property under the National Flood Insurance Act, as amended. The Secretary cannot guarantee a loan for the acquisition or construction of property located in an area identified by the Federal Emergency Management Agency as having special flood hazards unless the community in which such area is situated is then participating in the National Flood Insurance Program.