This is a simple Electronic Device Contract which you can use with your students if your building has strict regulations regarding Electronic Devices during the school day.
This file can be modified to suit your needs.
I use it when a student is using their phone in class, as they have to review the contract with me and sign next to the 1st offense where they acknowledge the date and teacher involved. From there, we review the rest of the consequences. I have used this for 5 years with no issues whatsoever.