Rule 2, Section 13, Article 1

Force is the result of energy exerted by a player which provides movement of the ball. The term force is used only in connection with the goal line and in only one direction, i.e., from the field of play into the end zone. Initial force results from a carry, fumble, kick, pass or snap. After a fumble, kick or backward pass has been grounded, a new force may result from a bat an illegal kick or a muff.

Rule 9, Section 4, Article 5

Running into or roughing the kicker or holder. A defensive player shall neither run into the kicker nor holder, which is contact that displace the kicker or holder without roughing; nor block, tackle or charge into the kicker of a scrimmage kick, or the place-kick holder, other than when:

a. Contact is unavoidable because it is not reasonably certain that a kick will be made.

b. The defense touches the kick near the kicker and contact is unavoidable.

c. Contact is slight and is partially caused by movement of the kicker.

d. Contact is caused by R being blocked into the kicker or holder by K.

Rule 6, Section 1, Article 9

A free kick shall not be kicked out of bounds between the goal lines untouched inbounds by R. If it is kicked out of bounds and R does not accept a penalty for kick-catch interference on the same kick as in 6-5-4, R has the following choices:

a. Accept a 5-yard penalty from the previous spot and have k rekick;

b. Accept a 5-yard penalty from the succeeding spot;

c. Put the ball in play at the inbounds spot 25 yards beyond the previous spot; or

d.. Decline the penalty and put the ball in play at the inbounds spot.