The key part, in terms of positioning, is the fielder’s first contact with the ball during the passage of play.
The fielder’s first contact with the ball must be made inside the boundary.
If he is airborne when making this first contact, he must have taken off from within the boundary.
The ball then can be fielded or caught, as long as the fielder is never in contact with both the ball and the ground outside the boundary at the same time.
So, on a second or third contact with the ball, the fielder can jump up from beyond the boundary and parry it back inside.
He can do this as many times as he wants, as long as he is never in contact with the ground beyond the boundary while
he is touching the ball.
The fielder’s first contact with the ball must be made inside the boundary.
If he is airborne when making this first contact, he must have taken off from within the boundary.
The ball then can be fielded or caught, as long as the fielder is never in contact with both the ball and the ground outside the boundary at the same time.
So, on a second or third contact with the ball, the fielder can jump up from beyond the boundary and parry it back inside.
He can do this as many times as he wants, as long as he is never in contact with the ground beyond the boundary while
he is touching the ball.