Asked by a Canadian

There's something wrong with this sentence but I can't put my finger on it!!

The federal government has put into effect a mandate that requires all gasoline in Canada to contain 5 percent ethanol.
Answered by a Canadian
Maybe another "that" after "requires"?? The "...that ____ that..." bothers me though. Too many 'that's!
Answered by a Canadian
and if another "that" was added then "to" would change to "must", I guess?
Answered by Ms. Sue
The sentence looks fine the way you typed it the first time. You don't need another "that" in this sentence.
Answered by Writeacher
The only thing I'd do to the original sentence is to remove "to" before "contain."