The city council of Berkeley, California, will vote on a cellphone ‘right to know’ law on Tuesday, which would require phone retailers to include a notice informing customers of the recommended distance a phone should be kept away from the body.

The proposed language includes the following warning: “If you carry or use your phone in a pants or shirt pocket or tucked into a bra when the phone is ON and connected to a wireless network, you may exceed the federal guidelines for exposure to RF [radio frequency] radiation.”