perm-ission
Consent that must be obtained from your parent/guardian --- or da person who would be footin' da bill at da salon, if you aren't able to pay for said makeover yerself --- before getting your hair done.
I'd saved enough of my allowance to pay for a makeover, but I figured I'd still better get perm-ission from my parents before heading down to Granny Annie's Clip 'n' Curl, just so that there wouldn't be any horrified "What happened to your hair?!??" wails when I got home again.