The rules state: "Each candidate for nomination for President of the United States and Vice President of the United States shall demonstrate the support of a plurality of the delegates from each of five (5) or more states, severally, prior to the presentation of the name of that candidate for nomination."
So in order for a motion to be made to place a candidate's name for nomination, they need to have that plurality from five states. Of the seven states that have already held their contests, four of them have yet to award their delegates since they have a state convention process. It is possible that Paul may have a plurality in all of those states or in none of those states. We do know that at present Romney has a plurality in two states (NH & FL), Gingrich has one state (SC).