Look in the NFHS manual, somewhere around section 200-220.  It does mention in the 2-official section that if a toss is blown down the officials are to make sure the clock hasn't started.  Or something like that.  I left my book in the car, but I remember reading something like this last night.  Could someone look it up and see whether this applies?
First game tonight, varsity boys.  34 games until baseball season 
Rich