On Saturday, July 9, 2016 at 7:38:36 AM UTC-7, Craig Reinholt wrote:
State safety chain requirements differ. Here is a summary by state.
http://www.expediter.com/natm%20pdf%...Laws-Table.pdf
When in doubt, go to your state DOT website and see what is required.

That suggests that if you license your trailer in the right state, you don't need chains.

In California, you need chains and they must be short enough to keep the tongue off the ground.