FEMA says provision in appropriations act does not roll back flood insurance rate hikes.
Legislation that would delay flood insurance rate hikes unlikely to pass in the House as written.
Mississippi-filed lawsuit now seen as last chance to stop January rate hikes.
National Flood Insurance Program unaffected by shutdown as rate hikes kick in.
Injunction sought against FEMA as new rates kick in Tuesday.
Senate panel members backtracking on votes to support rate hikes in subsidized federal flood insurance program.
Rates to sharply increase after Oct. 1, while Louisiana lawmakers cry foul.
Congress is currently deflecting intense pressure to roll back virtually all the increases in flood insurance premiums imposed in 2012.
The amendment passed 281-146, and the appropriations bill was later approved by the full House and sent to the Senate.
Mississippi insurance commissioner makes that observation, while FEMA says agency continues to eye NFIP privatization.