How quickly must the ball be grounded to be not held up?

[ChrisR]

OB - my point is that the decision should be made on actions and outcomes rather than just time.

"....and the laws instruct the ref to blow up." Davet - reference?

 

[OB..]

OB - my point is that the decision should be made on actions and outcomes rather than just time.

I'm afraid you cannot just duck the time issue. Nobody is suggesting a precise time, but then the same applies to "unplayable" in other contexts.