Hi Brendan,
the new rules were not yet released.
You are probably referring to https://junior.forum.robocup.org/t/manual-map-deletion-after-lop-considered-as-changing-the-program/ and Restarting the Robot . I am not sure what specific rule you are referring to, but the current rules never mention the term “button” together with “Lack of Progress”.
In the rules to be released you can basically do whatever you want, as long as it is always the same procedure. If you want to completely turn your robot on and off that is fine. But you can’t sometimes turn it on and off and then reset the Arduino with another switch if it stops working.
Keep in mind that local competitions may handle this differently. But as mentioned this will be more specific in the not yet released final rules for 2018.
Best,
Jan