Health Canada Issues Cell Phone Advisory

Warnings to cell tower workers posted on the gate to a transmission tower base. 
Can you kids read and understand what this sign is telling them to do?

On October 4, 2011, Canada joined Israel, Germany, India, France, Finland, Russia and Switzerlandin recommending that children under 18 limit their cell phone use. In response to the World Health Organization announcement that radiofrequency electromagnetic fields are a possible human carcinogen (in the same class as DDT, lead, and chloroform), Health Canada (Canadian federal government agency) issued a proactive advisory to encourage kids under 18 to limit cell phone usage, text rather than call, and use hands-free devices, More information is at http://tinyurl.com/3ts8sgn.