In what situation can the written lineup be changed?

Changing the written lineup is allowed between sets or for a legal substitution. This is a widely accepted rule in volleyball officiating that ensures coaches have the opportunity to adjust their strategies between sets or bring in different players as needed when a substitution is called. At the beginning of a set, the lineup presented to the officials is typically final, and any changes made thereafter should comply with the specific rules concerning substitutions. Understanding this mechanism is crucial for maintaining the flow and integrity of the match while providing teams the flexibility to respond to the dynamics of play.

Other options may imply scenarios where lineups could be adjusted more freely or at more arbitrary times, which does not align with the structured nature of volleyball rule enforcement. For example, changing the lineup at any time during a match would create confusion and inconsistencies, while only allowing changes during a timeout would limit necessary adjustments in competitive situations.