According to Wikipedia, all fifty states in the USA have passed school anti-bullying legislation, the first being Georgia in 1999. Montana became the most recent, and last, state to adopt anti-bullying legislation in April, 2015. A watchdog organization called Bully Police USA advocates for and reports on anti-bullying legislation.
Coordinated School Health - Bullying and Cyber-bullying

Bully Police USA

Bullying Laws

Stomp Out Bullying

An Overview of State Anti-Bullying Legislation and Other Related Laws (2012)

Bully Information from Other Experts

Sameer Hinduja, Ph.D. and Justin W. Patchin, Ph.D. (2016). State Cyberbullying Laws: A Brief Review of State Cyberbullying Laws and Policies. Cyberbullying Research Center @ Retrieved March 20, 2017, from... 

Emily Grobe (2012) Anti-Bullying Law Comes to Texas Schools. Reporting Texas. Retrieved March 2017, from...