ARTICLE 1. After the ball is ready for play, encroachment occurs when an offensive
player is in or beyond the neutral zone after the snapper touches or simulates (hand
at or below his knees) touching the ball before the snap (Exception: When the ball is
put in play, the snapper is not encroaching when he is in the neutral zone).
But that is not the point being made by the OP. The point is about the center moving the ball before the snap. Whether he is in the neutral zone or not has not value to the conversation.
The linesmen officials will be looking at the ball, not the flags because the flags will be behind them. I have already said they probably do not care if the center moves the ball just like you do not care if he moves the ball, just like you never see the D complain or the caches complain. It is an accepted thing.. it doesn't mean that no advantage is gained.
The ball IS the neutral zone. It is literally defined as the width of the ball:
SECTION 17. The Neutral Zone
ARTICLE 1. a. The neutral zone is the space between the two scrimmage lines
extended to the sidelines. Its width is equal to the length of the ball (Rule 2-21-2).
b. The neutral zone is established when the ball is ready for play and is resting on the
ground with its long axis at right angles to the scrimmage line and parallel to the
sidelines.
c. The neutral zone exists until there is a change of team possession, until a
scrimmage kick crosses the neutral zone or until the ball is declared dead.
Here is everything I found on the snap from the 2015 NCAA rules... knock yourself out...
[
SECTION 1. The Scrimmage
Starting With a Snap
ARTICLE 1. a. The ball shall be put in play by a legal snap unless the rules
provide for a legal free kick (A.R. 4-1-4-I and II).
PENALTY—Dead-ball foul. Five yards from the succeeding spot [S7 and
S19].
b. The ball may not be snapped in a side zone (Rule 2-31-6). If the starting
point for any scrimmage down is in a side zone, the ball shall be transferred
to the hash mark.
Shift and False Start
ARTICLE 2. a. Shift. After a huddle (Rule 2-14) or shift (Rule 2-22-1) and
before the snap, all Team A players must come to an absolute stop and remain
stationary in their positions for at least one full second before the ball is
snapped, without movement of the feet, body, head or arms (A.R. 7-1-2-I).
b. False Start. Each of the following is a false start by Team A if it occurs prior
to the snap after the ball is ready for play and all players are in scrimmage
formation:
1. Any movement by one or more players that simulates the start of a play.
2. The snapper moving to another position.
3. A restricted lineman (Rule 2-27-4) moving his hand(s) or making any
quick movement. [Exceptions: 1. It is not a false start if a Team A
lineman immediately reacts when threatened by a Team B player in the
neutral zone (Rule 7-1-5-a-2) (A.R. 7-1-3-V) 2. Rule 7-1-3-a-3].
4. An offensive player making any quick, jerky movement before the snap,
including but not limited to:
(a) A lineman moving his foot, shoulder, arm, body or head in a quick,
jerky motion in any direction.
(b) The snapper shifting or moving the ball, moving his thumb or
fingers, flexing his elbows, jerking his head, or dipping his shoulders
or buttocks.
(c) The quarterback making any quick, jerky movement that simulates
the beginning of a play.
(d) A back simulating receiving the ball by making any quick, jerky
movement that simulates the beginning of a play.
5. The offensive team never coming to a one-second stop prior to the snap
after the ball is ready for play (A.R. 7-1-2-IV).
Offensive Team Requirements—Prior to the Snap
ARTICLE 3. Each of the following (a-d) is a dead-ball foul. Officials should
blow the whistle and not allow the play to continue. After the ball is ready for
play and before it is snapped:
a. Snapper. The snapper (Rule 2-27-8):
1. May not move to a different position nor have any part of his body
beyond the neutral zone;
2. May not lift the ball, move it beyond the neutral zone or simulate the
start of a play;
3. May take his hand(s) off the ball, but only if this does not simulate the
start of a play.
b. Nine-Yard Marks.
1. Each Team A substitute must have been between the nine-yard marks.
Team A players who participated in the previous down must have been
between the nine-yard marks after the previous down and before the next
snap (A.R. 3-3-4-I).
2. All Team A players must have been between the nine-yard marks after a
charged team timeout, an injury timeout, a media timeout or the end of
a period.
c. Encroachment. Once the snapper is established no other Team A player may
be in or beyond the neutral zone [Exceptions: (1) Substitutes and departing
players; and (2) offensive players in a scrimmage kick formation who break the
neutral zone with their hand(s) to point at opponents].
d. False Start. No Team A player may commit a false start (Rule 7-1-2-b) or
contact an opponent (A.R. 7-1-3-III).
PENALTY—[a-d] Dead-ball foul: Five yards from the succeeding spot. [S7
and S19 or S20].
Offensive Team Requirements—At the Snap
ARTICLE 4. Violation of each of the following (a-c) is a live-ball foul; the play
is allowed to continue.
a. Formation. At the snap Team A must be in a formation that meets these
requirements:
1. All players must be inbounds.
2. All players must be either linemen or backs (Rule 2-27-4).
3. At least five linemen must wear jerseys numbered 50 through 79
(Exception: When the snap is from a scrimmage kick formation, par. 5
below.)
4. No more than four players may be backs.
5. In a scrimmage kick formation at the snap (Rule 2-16-10) Team A may
have fewer than five linemen numbered 50-79, subject to the following
conditions:
(a) Any and all linemen not numbered 50-79 who are ineligible
receiver(s) by position become exceptions to the numbering rule
when the snapper is established.
(b) Any and all such numbering-exception players must be on the line
and may not be on the end of the line. Otherwise, Team A commits a
foul for an illegal formation.
(c) Any and all such players are exceptions to the numbering rule
throughout the down and remain ineligible receivers unless they
become eligible under Rule 7-3-5 (forward pass touched by an
official or a Team B player).
The conditions in 5(a)–5(c) are no longer in effect if prior to the snap a
period ends or there is a timeout charged to the referee or one of the
teams.
b. Man in Motion.
1. One back may be in motion, but he may not be moving toward his
opponent’s goal line.
2. The player who goes in motion may not start from the line of scrimmage
unless he first becomes a back and comes to a complete stop.
3. A player in motion at the snap must have satisfied the one-second
rule—i.e., he may not start his motion before any shift has ended (Rule
2-22-1-c).
c. Illegal Shift. At the snap, Team A may not execute an illegal shift (Rule 7-1-
2-a). (A.R. 7-1-3-I-III).
PENALTY [a-c]—Live-ball foul: Five yards from the previous spot [S19 or
S20]. For live-ball fouls occurring when or after the snap starts
during scrimmage kick plays other than field goal plays: Five
yards from the previous spot or five yards from the spot where
the subsequent dead ball belongs to Team B (S18, S19, or S20).
Defensive Team Requirements
ARTICLE 5. The defensive team requirements are as follows:
a. Each of the following (1-5) is a dead ball foul. Officials should blow the
whistle and not allow the play to continue. After the ball is ready for play
and before the ball is snapped:
1. No player may touch the ball except when moved illegally as in Rule
7-1-3-a-1, nor may any player contact an opponent or in any other way
interfere with him.(A.R. 7-1-5-I-II).
2. No player may enter the neutral zone causing an offensive lineman to
react immediately or commit any other dead-ball offside foul (Rules
2-18-2 and 7-1-2-b-3-Exception) (A.R. 7-1-3-V and A.R. 7-1-5-III).
3. No player shall use words or signals that disconcert opponents when
they are preparing to put the ball in play. No player may call defensive
signals that simulate the sound or cadence of (or otherwise interfere
with) offensive starting signals.
FR-74 RULE 7 / SNAPPING AND PASSING THE BALL
4. Player(s) aligned in a stationary position within one yard of the line of
scrimmage may not make quick, abrupt or exaggerated actions that are
not part of normal defensive player movement (A.R. 7-1-5-IV).
5. No player may cross the neutral zone and without making contact
continue his charge toward any back.
PENALTY [1-5]—Dead-ball foul. Five yards from the succeeding spot [S18
or S21].
b. When the snap starts:
1. No player may be in or beyond the neutral zone at the snap.
2. All players must be inbounds.
PENALTY—Live-ball foul. Five yards from the previous spot [S18].
*****************
definition of the Neutral Zone......
SECTION 17. The Neutral Zone
ARTICLE 1. a. The neutral zone is the space between the two scrimmage lines
extended to the sidelines. Its width is equal to the length of the ball (Rule 2-21-2).
b. The neutral zone is established when the ball is ready for play and is resting on the
ground with its long axis at right angles to the scrimmage line and parallel to the
sidelines.
c. The neutral zone exists until there is a change of team possession, until a
scrimmage kick crosses the neutral zone or until the ball is declared dead.
SECTION 18. Encroachment and Offside
Encroachment
ARTICLE 1. After the ball is ready for play, encroachment occurs when an offensive
player is in or beyond the neutral zone after the snapper touches or simulates (hand
at or below his knees) touching the ball before the snap (Exception: When the ball is
put in play, the snapper is not encroaching when he is in the neutral zone).
Offside
ARTICLE 2. After the ball is ready for play, offside occurs (Rule 7-1-5) when a
defensive player:
a. Is in or beyond the neutral zone when the ball is legally snapped;
b. Contacts an opponent beyond the neutral zone before the ball is snapped;
c. Contacts the ball before it is snapped;
d. Threatens an offensive lineman, causing an immediate reaction, before the ball
is snapped (A.R. 7-1-3-V Note);
e. Crosses the neutral zone and charges toward a Team A back (A.R. 7-1-5-III);
or
f. Is not behind his restraining line when the ball is legally free-kicked.
Offside occurs when one or more players of the kicking team are not behind their
restraining line when the ball is legally free-kicked (Exception: The kicker and holder are not offside when they are beyond their restraining line) (Rule 6-1-2).