If you're asking jitspoe for matching rules, you're definitely asking the wrong person.
I can give you some need to know ones off the top of my head that has been the standard for the last 8 years.
- each team is allowed one restart per map and has to rejoin the color that was chosen for them. (If other team chose blue and you want to use your restart, they're still blue.)
- The other team gets to choose what color they want on the map you choose.
- Incase of tie both teams have to agree on a tie map and the color you were the map before is the color you'll be in tie map. (i.e. you go to tie and both agree on shazam22, if you were blue on the map before you'll be blue there.)
- The first team to reach 50 wins, so if someone has 2 flags and has 49 points while the other team caps for 52 points. The ending score would be 52 red 53 blue but red would still win for achieving 50 points before blue.
- If the match consists of a American vs. European team. The American team will play their map on the European server while the European team plays their map on an American server. The only way I've seen a tie map settled is one team chooses the tie map playing on the other teams server.
Those are pretty much the basics you need to know. I've never seen anyone mention not capping on a lagged player or dropping a player when someone else leaves to make the teams fair, but usually people do because it's common courtesy. Of course you don't have to abide by them, but usually people frown upon it.