So grep/ls/etc are all installed as part of that 'account holder' and do not need to do any age verification.
The signal only needs to be checked when the device/account user is a child and when downloading apps. I think an unfortunate consequence here is that the literal definition of the law says package managers probably can not run on children accounts without jumping through a bunch of hoops. Which is bad for children learning code/computers/etc.
The first thing I would change about this law would be:
> (b) (1) A developer shall request a signal with respect to a particular user from an operating system provider or a covered application store when the application is downloaded and launched.
Any application that does not need to know a users age should not be required request the 'signal'