What is the rule for a touchdown in the NFL?

Answer 1

The NFL set precedence on December 14, 2008 on what a touchdown reception is. Typically, it is when any part of the ball, legally in possession of a player inbounds, breaks the plane of the opponent's goal line, provided it is not a touchback or when the ball is touched on the pylon before a player goes out of bounds. Apparently, now, it is when the players feet are both in the end zone and the ball is in their possession, but does not break the plane of the opponent's goal line. According to a Google search, the rule regarding pylon touchdown dives was revisited and clarified. Previously, a player just had to have some portion of his body over the goal line or pylon to count a touchdown, but the rule was revised for 2007 to make it necessary to have the ball touch the pylon or break the plane above the pylon to count as a touchdown.