Rule 8 – Section 4 – Article 1 – How Scored
a. A field goal shall be scored if a scrimmage kick, which may be a drop kick or place kick, passes over the crossbar between the uprights of the receiving team’s goal before it touches a player of the kicking team or the ground.
b. If a legal field goal attempt passes over the crossbar between the uprights and is dead beyond the end line or is blown back but does not return over the crossbar and is dead anywhere, it shall score a field goal. The crossbar and uprights are treated as a line, not a plane, in determining forward progress of the ball.