As with other cases of the ball travelling out of the field of play, all of the ball must cross all of the line, otherwise play continues. A goal is credited to the team attacking the goal scored upon, regardless of which team actually caused the ball to enter the goal.
The conversion, try (American football, also known as a point(s) after touchdown, PAT, or (depending on the number of points) extra point/2-point conversion), or convert (Canadian football) occurs immediately after a touchdown during which the scoring team is allowed to attempt to score one extra point by kicking the
SECTION 2 – TOUCHDOWN A touchdown is scored when: the ball is on, above, or behind the plane of the opponents’ goal line (extended) and is in possession of a runner who has advanced from the field of play into the end zone. the Referee awards a touchdown to a team that has been denied…
A touchdown is earned when a player has legal possession of the ball and the ball touches or goes over the imaginary vertical plane above the opposing team’s goal line. After a touchdown, the scoring team attempts a try play for 1 or 2 points (see below).