Improvements to the in - competition administration of officials have already been trialled .
Improvements to the in - competition administration of officials have already been approved for AOB tournaments in 2017 after being successfully trial run at the Youth World Championships in St Petersburg in November 2016 .
Improvements to the in - competition administration of officials have already been trialled and approved for AOB tournaments in 2017 after being successfully trial run at the Youth World Championships in St Petersburg in November 2016 .