2-, 3-, or 15-yard line (not uncommon at lower levels of football, since as the season progresses, conditions may worsen toward the center of the field, especially at the spot from which the PAT is usually kicked; the kicker may thus request a spot where the footing is surer). During conversions, the ball is considered live in the CFL, American collegiate football, Texas high schools, the now-defunct NFL Europa, and starting with the 2015 season the NFL itself. As such, this allows the defensive team to gain two points on an interception or fumble return should they reach the kicking team's end zone, or (in the CFL) one point should the defensive team make an open-field drop kick through the kicking team's goalposts. Conversely, in other levels of American football and amateur Canadian football, defensive teams cannot score during a try. A small plastic tee, which can be high (smaller than the kickoff tee), may be used for field goals and extra points in some leagues, including US high schools and Canadian amateur play. The NFL (and most other professional leagues) has never allowed the use of tees for extra-point kick attempts, having always required kickers to kick off the ground for such attempts (and for field goals; a rare exception for a U.S.-based pro league to allow the usage of such tees for such attempts was the original USFL in the 1980s). In 1948, the NCAA authorized the use of the small rubberized kicking tee for extra points and field goals, but banned them by 1989, requiring kicks from the ground, as in the NFL. The CFL allows the use of a tee for field goals and convert kicks, but it is optional. Runner down In Canadian amateur football, the ball is not dead if a player kneels momentarily to, and does, recover a rolling snap, onside/lateral pass, or opponent's kick, while in American amateur football, such a situation produces a dead ball, unless the player is the holder for a place kick. The holder is allowed to catch the snap or recover a rolling snap while on a knee to hold the kick and may also rise to catch a high snap and immediately return to a knee. At professional levels in both games, unless it is a clearly willful kneel or slide by a ball carrier to go down, a player must be touched while on the