FHA doesn't specifically require a 10 year warranty on new construction, however they accept a 10 year warranty in place of the initial inspection. If you have any more questions, feel free to contact me.
I never heard of such a stipulation to begin with. I know there is one required with VA, but have not heard of such a thing with FHA. However what builder doesnt offer a 10 year warranty anyways. Not sure I would want my clients going with such a builder.