To enforce the 10 and 20 second time limits the defence should use a Pre-stall, by loudly counting down the time limit in 5-second intervals. The Pre-stall should be noticeable by the offence player closest to the disc. The player who calls the time limits does not need to be the same player who becomes the marker. If the disc lands out-of-bounds and then rolls back and stops in the playing field, the time limits in 8.5.2 do not apply (unless games are using the WFDF Rules of Ultimate Appendix). For events where the WFDF Rules of Ultimate Appendix are in use, the time limits also apply to discs that are out-of-bounds, and for the pull. It is recommended that the opposing team provide a warning to the opposition and make sure they are aware of the rule before enforcing any time limits. If the offence believes that the time limits are being counted too quickly, they can call a fast count.The defence must allow an unobstructed path by the offence to the disc and to the pivot location.