according to the law of our country,it is (not until you're

according to the law of our country,it is (not until you're eighteen)that you can get your driving license （强调句）
=according to the law of our country,not until you're eighteen can you get your driving license（否定副词前置的部分倒装语序）
=according to the law of our country,you can't get your driving license until you're eighteen（正常语序）
注意： not 要在until 前