There is no requirement that it be signed/notarized after you are 21.
Although DPS recommends you wait until you are 21, I see no reason to. Why not submit all the documents 4 months before your 21st birthday. They will NOT issue a license before you turn 21 but should right after. (Might want to write in an explanation on the notarized statements that you are NOT 21 today but will be on XX/YY/19xx.)
Tacomaoffroader wrote:Hey Rooster,
Just FYI if ya didn't know; you can take the CHL class up to 6 months (last I heard) before you turn 21 so that all you have to do when you turn 21 is get your instructor to sign it and notarize it and you can turn the paperwork in without having to wait.
-Laurence