If you look at the fee page in the JUMP app, it will presumably look like mine:

I was surprised to see no ‘Out of system area fee’, so I asked support, who said “There is a $25 out of system fee for locking bikes out of the system area in Sacramento.  In general, the first instance is waived and an email is sent educating the user about the system area.  Any future out of system locks will result in the fee being charged.”