The Glynwood Center for Food and Farming is hosting this event. Details to follow.

While I am on the topic of legal challenges, UNICEF has produced an invaluable resource.
PROTECTING CHILDREN FROM UNHEALTHY FOOD MARKETING: A Toolkit for Developing Effective Laws.
It is based on a previous UNICEF document, Taking Action to Protect Children from the Harmful Impact of Food Marketing: A Child Rights-based Approach.
It includes Model Legal Language along with essential background information.
Use it!
Introduction pages
Steps
Spotlights and tools