When can a lifter make changes to their attempt during the competition?

In powerlifting competitions governed by the International Powerlifting Federation (IPF) rules, a lifter has the opportunity to change their attempt during specific points in the event. The correct answer indicates that changes can only be made once the weight has been set for their next attempt. This means that after a lifter has completed their current attempt, they can adjust the weight they plan to lift next before the official call for that attempt is made. This rule allows lifters to adapt their strategy based on their previous performance in the competition, ensuring they can make informed decisions about their next lifts.

The other options highlight moments that do not pertain to the lifter's ability to change their attempt. Changes made before the competition or during the warm-up period do not apply to setting attempts in the official lifts sequence. The competition protocol outlines the flow of the event, but it is specifically controlled by the attempt setting process that allows adjustments only after the previous lift has been finalized. Understanding this timing is crucial for a lifter’s strategy and performance during the competition.