This is what you wrote.
Item 1 is talking about a receiver going to the ground.
a) secures control of the ball in his hands or arms prior to the ball touching the ground; and
b) touches the ground inbounds with both feet or with any part of his body other than his hands
A player at this point is still a receiver and must meet the Item 1 requirements.
When a player does this:
c) maintains control of the ball long enough, after (a) and (b) have been fulfilled, to enable him to perform any act common to the game (i.e., maintaining control long enough to pitch it, pass it, advance with it, or avoid or ward off an opponent, etc.).
They become a runner and Item 1 no longer applies to that player.
How is that different than what I said? And I did ask if that's what you meant. So if it's not, then please clarify.