IKSFA competition rule. Snatch Rules category.
An initial/extra swing at the start of the snatch set is a violation. If the athlete performs one swing after the START command, the judge gives the CHANGE OF HAND command (warning). If the athlete makes a swing at the beginning and continues snatching (ignoring the command), the judge gives the STOP command.
See the interactive comparison on KETTLEBELL MONSTER™ for filterable views and more detail.