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Volleyball · Official Volleyball Rules

Law 15: Interruptions

4 parts · 5 tests · 50 facts · updated 25 October 2026 · markdown

Time-outs and substitutions: how many, in what order and who may request them, the limits on substitutions, exceptional and illegal substitutions, the substitution procedure, and improper requests.

15.151Time-outs and Requests

The regular interruptions, their number and order, who may request them, and how time-outs work.

Test 1Time-outs and the order of requestsTake a test

  1. The only regular interruptions are time-outs and substitutions.

    Source: FIVB OVR 2025-2028, Rule 15 · recall

  2. Each team may request at most two time-outs and six substitutions in a set.

    Source: FIVB OVR 2025-2028, Rule 15.1 · recall

  3. All requested time-outs last 30 seconds; at top events the FIVB may approve another length.

    Source: FIVB OVR 2025-2028, Rule 15.4.1 · recall

  4. In every time-out the players in play go to the free zone near their bench.

    Source: FIVB OVR 2025-2028, Rule 15.4.2 · recall

  5. Only the coach may request them, or in the coach's absence the assistant coach or the game captain.

    Source: FIVB OVR 2025-2028, Rule 15.3.1 · recall

  6. A time-out is asked for with the hand signal while the ball is out of play and before the whistle for service.

    Source: FIVB OVR 2025-2028, Rule 15.4.1 · recall

  7. At the top level the buzzer and then the hand signal are obligatory.

    Source: FIVB OVR 2025-2028, Rule 15.4.1 · recall

  8. Both time-outs are gone and four of the six substitutions are used, leaving two substitutions.

    Source: FIVB OVR 2025-2028, Rule 15.1 · applied

  9. One or two time-outs and one substitution request may follow one another in the same interruption.

    Source: FIVB OVR 2025-2028, Rule 15.2.1; Casebook 2024 4.28 · applied

  10. A third time-out is improper, but once it has actually delayed the game it is curtailed and sanctioned as a delay.

    Source: FIVB OVR 2025-2028, Rule 15.11.1.4; Casebook 2024 4.29 · applied

15.152Substitution Limits

What a substitution is, how often starters and substitutes may change, and the limits in match situations.

Test 1Who may come on, and how oftenTake a test

  1. A player other than the Libero or his replacement player enters, after being recorded, to take another player's position.

    Source: FIVB OVR 2025-2028, Rule 15.5.1 · recall

  2. A starter may leave once and re-enter once per set, only to his previous position in the line-up.

    Source: FIVB OVR 2025-2028, Rule 15.6.1 · recall

  3. A substitute can only be substituted by the starting player he replaced.

    Source: FIVB OVR 2025-2028, Rule 15.6.2 · recall

  4. A substitute may enter in place of a starter only once per set.

    Source: FIVB OVR 2025-2028, Rule 15.6.2 · recall

  5. Two or more players may be substituted at the same time within the same request.

    Source: FIVB OVR 2025-2028, Rule 15.2.2 · recall

  6. Separate substitution requests by the same team need a completed rally in between, injury and expulsion cases apart.

    Source: FIVB OVR 2025-2028, Rule 15.2.3 · recall

  7. A substitution before the start of a set is allowed and is recorded as a regular one in that set.

    Source: FIVB OVR 2025-2028, Rule 15.3.2; Casebook 2024 4.12 · applied

  8. No. 12 came on for No. 5, so only No. 5 may replace him, returning to his own position.

    Source: FIVB OVR 2025-2028, Rule 15.6 · applied

  9. A starter may leave once and come back once, after which no further substitution involving him is possible.

    Source: FIVB OVR 2025-2028, Rule 15.6.1 · recall

  10. Two substitution requests by the same team must be separated by a completed rally.

    Source: FIVB OVR 2025-2028, Rule 15.2.3 · recall

Test 2Substitution limits in match situationsTake a test

  1. Only one substitution remains, so the coach picks one and the other is rejected as an improper request.

    Source: FIVB OVR 2025-2028, Rule 15.1, 15.11; Casebook 2024 4.14 · applied

  2. Leaving once and returning once uses up the starter's substitutions for the set.

    Source: FIVB OVR 2025-2028, Rule 15.6.1 · applied

  3. The pairing is fixed: a substitute can only be replaced by the starter he came on for.

    Source: FIVB OVR 2025-2028, Rule 15.6.2, 15.9.1 · applied

  4. Two time-outs may be taken in one interruption, but two substitution requests may not.

    Source: FIVB OVR 2025-2028, Rule 15.11.1.3; Casebook 2024 4.28 · applied

  5. After a rejected request sanctioned by a delay warning, no regular interruption may be requested in the same interruption.

    Source: FIVB OVR 2025-2028, Rule 15.2.4; Casebook 2024 4.30.1 · applied

  6. The request starts when a substitute enters the zone, so only that player's substitution is part of it.

    Source: FIVB OVR 2025-2028, Rule 15.10.3.1; Casebook 2024 4.2 · applied

  7. A second substitution in the same interruption is improper even after a time-out; the others are legal.

    Source: FIVB OVR 2025-2028, Rule 15.2, 15.7, 15.11.1.3; Casebook 2024 4.9, 4.28 · applied

  8. Without delay, the extra request is simply rejected as improper and written on the score sheet.

    Source: FIVB OVR 2025-2028, Rule 15.11; Casebook 2024 4.14 · applied

  9. With six per set, they have four, two and none left.

    Source: FIVB OVR 2025-2028, Rule 15.1 · applied

15.153Exceptional and Illegal Substitutions

Substituting an injured or expelled player beyond the limits, an incomplete team, and correcting an illegal substitution.

Test 1Exceptional and illegal substitutionsTake a test

  1. An exceptional substitution is allowed when a player cannot go on through injury, illness, expulsion or disqualification and no legal one is possible.

    Source: FIVB OVR 2025-2028, Rule 15.7 · recall

  2. Any player not on court at that moment may enter, except the Libero, the second Libero and their regular replacement player.

    Source: FIVB OVR 2025-2028, Rule 15.7 · recall

  3. The player replaced exceptionally may not re-enter the match.

    Source: FIVB OVR 2025-2028, Rule 15.7 · recall

  4. It is never counted as a regular substitution but is recorded as part of the total for the set and match.

    Source: FIVB OVR 2025-2028, Rule 15.7 · recall

  5. Legal substitution first, then exceptional; if neither is possible the team is incomplete.

    Source: FIVB OVR 2025-2028, Rule 15.8 · recall

  6. A substitution is illegal if it exceeds the limits of Rule 15.6, outside the exceptional case, or involves an unregistered player.

    Source: FIVB OVR 2025-2028, Rule 15.9.1 · recall

  7. He may substitute exceptionally, and the expelled player cannot return, or accept that the team is incomplete for that set.

    Source: FIVB OVR 2025-2028, Rule 15.8; Casebook 2024 4.11 · applied

  8. Team A's points since the fault are cancelled, team B keeps its 16 and gains a point and the service.

    Source: FIVB OVR 2025-2028, Rule 15.9.2 · applied

  9. Rule 15.9.2 sets the order: the penalty, the correction, then the cancellation of points.

    Source: FIVB OVR 2025-2028, Rule 15.9.2 · recall

  10. Only when a legal substitution is impossible may the team substitute exceptionally, and only then is it incomplete.

    Source: FIVB OVR 2025-2028, Rule 15.8 · recall

15.154Procedure and Improper Requests

The substitution zone, when a request starts, who authorises it, and how improper requests are treated.

Test 1Substitution procedure and improper requestsTake a test

  1. Substitutions take place within the substitution zone.

    Source: FIVB OVR 2025-2028, Rule 15.10.1 · recall

  2. Entering the substitution zone ready to play, during an interruption, is the request itself.

    Source: FIVB OVR 2025-2028, Rule 15.10.3.1 · recall

  3. Otherwise no hand signal is needed: entering the zone is the request.

    Source: FIVB OVR 2025-2028, Rule 15.10.3.1 · recall

  4. If the player is not ready at the moment of the request, it is not granted and the team is sanctioned for delay.

    Source: FIVB OVR 2025-2028, Rule 15.10.3.2 · applied

  5. The scorer or the 2nd referee acknowledges the request by buzzer or whistle, and the 2nd referee authorises it.

    Source: FIVB OVR 2025-2028, Rule 15.10.3.3 · recall

  6. Requests during a rally or at or after the whistle to serve are improper.

    Source: FIVB OVR 2025-2028, Rule 15.11.1.1 · recall

  7. The first such request is rejected and noted on the score sheet without other consequences; later ones are delays.

    Source: FIVB OVR 2025-2028, Rule 15.11.2, 15.11.3 · recall

  8. C is the substitution zone between the attack-line extensions by the scorer's table; A is a warm-up area, B the Libero Replacement zone, D behind the end line.

    Source: FIVB OVR 2025-2028, Rule 1.4.3, 15.10.1 · applied

  9. Entering the zone makes the request, which is acknowledged, authorised and then carried out and recorded.

    Source: FIVB OVR 2025-2028, Rule 15.10 · recall

  10. All substitutes must enter together to be in the same request, and the changes are made one pair after another.

    Source: FIVB OVR 2025-2028, Rule 15.10.4 · recall

Sources

FIVB Official Volleyball Rules 2025-2028, Rule 15 (paraphrased in original wording; original questions authored from the Rules, not reproduced)

  • FIVB OVR 2025-2028, Rule 15.74
  • FIVB OVR 2025-2028, Rule 15.13
  • FIVB OVR 2025-2028, Rule 15.4.13
  • FIVB OVR 2025-2028, Rule 15.6.13
  • FIVB OVR 2025-2028, Rule 15.6.22
  • FIVB OVR 2025-2028, Rule 15.2.32
  • FIVB OVR 2025-2028, Rule 15.82
  • FIVB OVR 2025-2028, Rule 15.9.22
  • FIVB OVR 2025-2028, Rule 15.10.3.12
  • FIVB OVR 2025-2028, Rule 151
  • FIVB OVR 2025-2028, Rule 15.4.21
  • FIVB OVR 2025-2028, Rule 15.3.11
  • FIVB OVR 2025-2028, Rule 15.2.1; Casebook 2024 4.281
  • FIVB OVR 2025-2028, Rule 15.11.1.4; Casebook 2024 4.291
  • FIVB OVR 2025-2028, Rule 15.5.11
  • FIVB OVR 2025-2028, Rule 15.2.21
  • FIVB OVR 2025-2028, Rule 15.3.2; Casebook 2024 4.121
  • FIVB OVR 2025-2028, Rule 15.61
  • FIVB OVR 2025-2028, Rule 15.1, 15.11; Casebook 2024 4.141
  • FIVB OVR 2025-2028, Rule 15.10.4; Casebook 2024 4.151
  • FIVB OVR 2025-2028, Rule 15.6.2, 15.9.11
  • FIVB OVR 2025-2028, Rule 15.11.1.3; Casebook 2024 4.281
  • FIVB OVR 2025-2028, Rule 15.2.4; Casebook 2024 4.30.11
  • FIVB OVR 2025-2028, Rule 15.10.3.1; Casebook 2024 4.21
  • FIVB OVR 2025-2028, Rule 15.2, 15.7, 15.11.1.3; Casebook 2024 4.9, 4.281
  • FIVB OVR 2025-2028, Rule 15.11; Casebook 2024 4.141
  • FIVB OVR 2025-2028, Rule 15.9.11
  • FIVB OVR 2025-2028, Rule 15.8; Casebook 2024 4.111
  • FIVB OVR 2025-2028, Rule 15.10.11
  • FIVB OVR 2025-2028, Rule 15.10.3.21
  • FIVB OVR 2025-2028, Rule 15.10.3.31
  • FIVB OVR 2025-2028, Rule 15.11.1.11
  • FIVB OVR 2025-2028, Rule 15.11.2, 15.11.31
  • FIVB OVR 2025-2028, Rule 1.4.3, 15.10.11
  • FIVB OVR 2025-2028, Rule 15.101
  • FIVB OVR 2025-2028, Rule 15.10.41