[villages07]

Through the wonders of Google, I found a Fed Govt research paper on golf cart seat belts. The pdf link below is a 9MB file, including pictures from cornering tests using unbelted and belted test dummies.

It appears that the golf cart manufacturer's position was that seat belts for low speed vehicles are detrimental in rollover incidents because the person is trapped. If unbelted they can escape before the rollover is complete. The govt study implies that rollovers are less likely than being ejected during a fast cornering maneuver and that belts are effective in these incidents.

Here's the link for you wonks that like to read Govt Studies:

http://www-nrd.nhtsa.dot.gov/pdf/nrd.../05-0431-W.pdf