To enforce the 10 and 20 second time limits the defence should loudly count down the time limit in 5-second intervals. The player who calls the time limits does not need to be the same player who becomes the marker. For events where the "WFDF Rules of Ultimate 2017 -- Appendix" are in use, the penalties also apply to discs that are out-of-bounds, and for the pull. Refer to A5.8 for details. 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. 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.