What is great about this district is that they empower schools to modify the policy to their needs. Standardizing a policy in a district that can be customized to the needs of the students in a particular school is a best practice that all innovative districts should consider.
Of course the policy is just one of the ingredients needed for success. Forsyth County Schools addresses many of the others in their frequently asked questions which you can find here.
Check out or more ideas about thinking outside the ban to harness the power of student-owned devices for learning including policies, contracts, management ideas, and research.