I dunno, Inox asked.
I would suggest printing it doublesided to be safe. Would suck to get it bounced if it was printed single-sided.
I do know that for the Form 1 and Form 4, many people would print them single-sided, and the NFA branch has sent them back because of that.
Do you want an AOW or C&R SBS/SBR in CA?
FrontSight Training Course certificates available $25, PM for details on them and other options.
No posts of mine are to be construed as legal advice, which can only be given by a lawyer.