WASHINGTON (AP) — Some flood insurance premiums won't be raised until the fall of 2015 at the earliest.

The Federal Emergency Management Agency says new requirements from Congress will delay higher premiums required by new flood maps.

The issue affects hundreds of thousands of homeowners who currently pay "grandfathered," below-market rates for insurance because their homes were in compliance with earlier flood codes.

The changes are required under a 2012 law intended to reform the money-losing federal flood insurance program.

Other changes would take place as planned, including higher premiums for frequently-flooded properties and on 1.7 million second homes.

And people getting subsidized premiums still won't be able to pass them on to people who purchase their homes.