The Twin Galaxies' policy is that there is no formalized "break" offered. Rather, the gamer is allowed to spend as little or as much time away from their game in progress as they want, mid-attempt, and must be responsible for the results of their actions.
Thus, if a gamer wishes to rest while 800 men on "Q*Bert" are lost in
the process, that is their decision to do so, and at their own risk.
During these self-imposed "breaks" the gamer's attempt must remain
untouched by another individual, or the game attempt becomes void.
However, during this time, the controls may be adjusted / tightened
providing the actions are caught on camera.
Some games have a non-glitch tactic available which allows the gamer
to set up or create an artificial "break" in the action, which further
allows them to enter a state where their game is in little or no
danger of changing in immediate status for a period of time. Such
titles would be the “pacman-type” series in which "hiding spots" allow
refuge for a few minutes until the ghosts reverse directions.
Such tactics are allowable ONLY IF this situation is temporary and
eventually changes on it's own accord. However, some non-glitch
tactics can provide refuge for an indeterminate period of time. Using
these tactics, only a fifteen (15) minute break is allowed every 3
hours.
For example, in "Tron", a gamer in the "Red Tank Wave" can hide in the
top right corner for a lengthy period of time, and is therefore
invalid for usage in marathon gameplay unless the gamer only does so
for 15 minutes every 3 hours.
-Twin Galaxies Marathon Policy
So this would be allowed only for a 15 minute break every 3 hours.