アルティメット公式ルール

11. アウト・オブ・バウンズ

1. 11.1. プレイングフィールド内は、すべてイン・バウンズである。プレイングフィールドの外周（ライン上）はプレイングフィールドの一部ではないため、アウト・オブ・バウンズである。選手でない人（フィールドにいる最大 14 人以外の人）は、すべてアウト・オブ・バウンズの一部とみなされる。
   Steinarのコメント（非公式！）： Catching on the line

   This means that if you are catching while one or both feet are touching the line, or are landing on the line after a catch, you are out-of-bounds.

2. 11.2. アウト・オブ・バウンズは、イン・バウンズではない地面及びその地面に触れているすべてのものを指す。ただし、ディフェンス側の選手は例外であり、常にイン・バウンズとみなされる。
3. 11.3. アウト・オブ・バウンズではないオフェンス側の選手は、イン・バウンズである。
   1. 11.3.1. 空中にいる選手のイン・バウンズ／アウト・オブ・バウンズの状態は、選手がプレイングフィールド、もしくはアウト・オブ・バウンズに接触するまで変わらない。
      解釈： The “Greatest Play in the World”

      What: An offensive player realises that they cannot catch the disc in-bounds and jumps from an in-bounds position, catches the disc and throws it before they land out-of-bounds.

      Result: This is a valid pass.

      Why: Rule 11.3.1 states that an airborne player who jumped from in-bounds is still in-bounds. This lasts until the player lands out-of-bounds and by that time the player has already released the disc. Therefore, the disc is not out.

      Extra: A player is allowed to throw the disc while in the air, according to rule 18.2.1.1.

      A player may not catch their own “greatest” throw, unless it is touched by another player before the thrower catches it, as per rule 13.2.5.

      If there is a contested call regarding the catch after a “greatest”, the player who threw the “greatest” should be treated as the last thrower. They should establish a pivot at the point on the field closest to where they released the disc (or on the goal line if this would result in a pivot in their attacking end zone).

   2. 11.3.2. ディスクをキャッチし、プレイングフィールドに接触してからアウト・オブ・バウンズに出てしまった選手は、ディスクの所有権を確立するまでディスクを保持している限り、イン・バウンズとみなされる。
      1. 11.3.2.1. この場合、選手はプレイングフィールドの外周を越えた位置まで戻り、プレイングフィールド内にピボットポイントを確定させなくてはならない（14.3 が有効である場合は除く）。
         Steinarのコメント（非公式！）： Pivot foot on the line

         Note that this rule talks about pivot point, not pivot foot. As long as your pivot point (the point you are rotating around) is in-bounds, your pivot foot can be on the line in this situation. See also annotation on 13.8, and 11.3.3 below.

   3. 11.3.3. アウト・オブ・バウンズに接触したスローワーは、パスを出すまではイン・バウンズとみなされる 。
      Steinarのコメント（非公式！）： Pivoting out of bounds

      This means that after an in-bounds catch, you can set your non-pivot foot out of bounds; this is not a turnover.

   4. 11.3.4. 選手同士の接触は、イン・バウンズ／アウト・オブ・バウンズの状態に影響を与えない。
4. 11.4. 以下のような場合は、アウト・オブ・バウンズに接触したことによるターンオーバーであり、キャッチは成立していないと判断される。
   解釈： What to call when in or out

   If an opponent believes an offensive player has caught the disc out-of-bounds they should make a call immediately by saying “Out-of-bounds” or “Out” for short. “Check feet” is a not a call and this call does not stop play.

   The player making the “Out” call should be reasonably certain that the player was out otherwise they should not make the call.

   If it is unclear if the player was out-of-bounds then play should stop as the players with best perspective discuss the call. Players may ask for perspective from people on the side-line, however it is still up to the players involved to make the final call. If the call is contested the disc shall be returned to the previous thrower.

   Extra: For games played on unlined fields the receiver should be given the benefit of the doubt for close “Out-of-bounds” calls.

   解釈： Catch close to the sideline

   What: A player catches a pass very close to the sideline and then goes out of bounds and establishes possession

   Result: As long as the player catches the pass (by having a non-spinning disc trapped between at least two body parts) while also being in contact with the in-bounds area (and not being in contact with the out-of-bounds area) this is an in-bounds reception.

   Why: Rules 11.3.2 means that once the player has caught the disc, they can go out of bounds, as long as they maintain the catch until they establish possession.

   Extra: If the player who caught the disc in-bounds does contact out-of-bounds, and then fumbles the disc before they establish possession, that is an out-of-bounds turnover, regardless of whether or not they regain possession before the disc hits the ground.

   1. 11.4.1. オフェンス側の選手がディスクに触れた際に、その選手がアウト・オブ・バウンズに接触していた場合。
      解釈： Receiving contacting out-of-bounds

      If the receiver’s feet are in-bounds, but their hair or clothing is touching the ground out-of-bounds, they are considered out-of-bounds.

   2. 11.4.2. オフェンス側の選手が空中でディスクをキャッチした後、ディスクに触れたまま最初に接触したものがアウト・オブ・バウンズである場合。
      Steinarのコメント（非公式！）： First contact

      For the definition of “first contact”, see annotation on 14.1.1; if you catch the disc while in the air and land with both feet approximately at the same time, and one of them is out or touching the line, you are out.

5. 11.5. ディスクは、プレイが有効な状態になった、もしくはプレイが開始された時点で、イン・バウンズとみなされる。
6. 11.6. ディスクは、最初にアウト・オブ・バウンズ、もしくはアウト・オブ・バウンズにいるオフェンス側の選手に触れた時点でアウト・オブ・バウンズとなる。ディスクがオフェンス側の選手によってキャッチされた場合、イン／アウト・オブ・バウンズは、その選手と同じ状態とみなされる。ディスクが同時に複数のオフェンス側の選手にキャッチされ、そのうちの 1 人がアウト・オブ・バウンズの場合、ディスクもアウト・オブ・バウンズとなる。
7. 11.7. ディスクは、プレイングフィールドの外周を一度越えてからプレイングフィールド内に戻ってくることができる。選手は、アウト・オブ・バウンズに出てディスクに対してプレイすることができる。
   解釈： Leaving the playing field

   Players are allowed to leave the playing field to make a play on the disc and may re-enter the field at any point. However it is a turnover if an offensive player jumps from out-of-bounds and contacts the disc before they contact the playing field (Rule 11.3.1/11.6/13.1.3).

   Steinarのコメント（非公式！）： Leaving the playing field

   It is presumably also allowed to leave the playing field to avoid a dangerous situation, even if you are not making a play on the disc. E.g., if someone comes diving towards you, the safest option may very well be to make a jump out-of-bounds.

8. 11.8. アウト・オブ・バウンズへ出た位置とは、ディスクがアウト・オブ・バウンズもしくは選手に触れる最も直前に、以下のいずれかの状態であった位置のことである。
   解釈： Disc goes out of bounds

   What: A long throw from the sideline doesn’t come back in field. Where do you set your pivot correctly and continue to play?

   Result: A defender is always in bounds when making a play on the disc (11.2). This means that if a defender touches the disc whilst out of bounds – the disc is then played from nearest point on the central zone (11.8.2). Note: if a defender hits the disc but the wind takes the disc back in field - the play is still live.

   Offensive players can become out of bounds (11.6). This means in the same situation if offence touches the disc first then it is a turnover and the disc goes back to where it crossed the perimeter line (i.e. was last in-bounds). (11.8.1).

   If an offensive player jumps from in-bounds and touches the disc before landing, then that establishes a point where the disc was in-bounds. If this results in a turnover, without the receiver ever establishing possession, the disc will come into play at the point nearest to where the offensive player touched the disc. If the receiver catches the pass and throws it while in the air, and the disc lands in-bounds, then that establishes the disc as being back in-bounds.

   Note: If players who had good perspective on the play cannot agree on where the disc went out-of-bounds, the midpoint between the two proposed locations should be used.

   Extra: If a defender jumps, intercepts a pass, and then lands out-of-bounds, this is not a “double turnover” - the defender still retains possession.

   1. 11.8.1. ディスクがプレイングフィールドから部分的または全体的に外周を超えた位置。
   2. 11.8.2. イン・バウンズの選手に接触した位置。
9. 11.9. ディスクがアウト・オブ・バウンズとなり、適切なピボットの位置から【3m】を超えて離れた場合は、選手でない人がディスクを回収することができる。ただし、プレイングフィールドから【3m】の位置からは、スローワーがディスクを運ばなければならない（選手ではない人がディスクを運べるのは 3m の位置まで）。
   解釈： Non-player retrieving an out-of-bounds disc

   What: A non-player retrieves an out-of-bounds disc and returns it to the thrower who is standing on the perimeter line.

   Result: Rule 11.9 allows non-players to retrieve the disc, however the thrower must carry the disc the last 3 metres. Therefore the thrower should walk 3 metres away from the field and then return. They may then establish a pivot at the correct spot and continue play.

   Extra: If the thrower commences play without going 3 metres away the opposition may call violation and play will restart with a check.

   However if the opposition does not feel they have been disadvantaged by the disc being returned to the thrower, they can allow play to continue. Non-players may also stop an out-of-bounds rolling disc that is more than 3 metres from the pivot point.

   The team in possession may choose to substitute a disc if the disc is out-of-bounds, and it will save time to substitute it. The thrower must still carry the disc the last 3 metres to the field. The thrower should notify the nearest defender if they are substituting the disc.

   Note: Non-players should not intentionally touch a disc until it has become out-of-bounds.

   Steinarのコメント（非公式！）： Retrieving a disc for another player

   You also are not allowed to retrieve a disc for a teammate. Once you pick up the disc, you have established possession (by the definition of possession); 8.3 says you cannot transfer possession during dead play, and 13.6 says you cannot transfer possession after a turnover.

   You should not, in general, retrieve a disc for an opponent; even though it would be polite, you don't know who from the other team would want it (giving them the same problem as in the previous paragraph), and you may either be slowing their team down or giving them less time to prepare. If it's far out of bounds, though, it would probably be fine to take on the role of a non-player from the previous annotation and put it neatly on the ground three meters away from the field.