[thefro526]

Here's what I've been told this year.

You can step forward as soon as autonomous ends. Meaning that, you can be at the controls during any kind of delay between autonomous and teleop.

USUALLY, you can go by the buzzer. I've seen a few teams step forward at the buzzer and then a ref informs them they stepped forward too early. Here's the thing, the buzzer and other sounds can lag behind or run ahead of the Clock by up to a second or two so it's always best to go by the clock.

That being said, as soon as the Autonomous Time reads Zero, you SHOULD be able to step forward and touch the controls, or at least that's how I do it.

*Disclaimer* I am not a member of the GDC and this is not the place for official answers. If you're problem persists please contact the GDC through the Q/A system for help.