Decerto released version 1 of their MW2 rules a few weeks ago. You can view the original article here, though the quote below lists all of them. Keep in mind this is just the first version, as the competitive scene gains more experience and feedback, the rules will be a lot more finely tuned in later versions.
Decerto MW2 Rules, Version 1
Basic Settings
Spectating: Team only
Friendly Fire: Enabled
Forced Respawns: Enabled
Wave Spawn Delay: None
Respawn Delay: 5 seconds Demolition / 7.5 seconds Capture The Flag.
Radar Always On: Disabled
Max Health: Normal
Health Regeneration: Normal
Kill Cam: Enabled
Headshots Only: Disabled
Third Person View: Disabled
Allow Perks: Enabled
Killstreak Rewards: Disabled
Number of Lives: Unlimited (1 for Search and Destroy.)
Join in Progress: Disabled
Hardcore Mode: DisabledSearch and Destroy
Round Length: 2.5 Minutes
Bomb Timer: 45 Seconds
Number of lives: 1 Life
Plant Time: 7.5 Seconds
Defuse Time: 7.5 Seconds
Multi Bomb: Disabled
Score Limit: 4 Points
Round Switch: Every RoundCapture The Flag
Time Limit: 10 Minutes
Score Limit: Unlimited
Respawn Delay: 7.5 SecondsDemolition
Time Limit: 2.5 Minutes
Round Switch: Every Round
Bomb Timer: 45 Seconds
Plant Time: 5 Seconds
Defuse Time: 5 Seconds
Extra Time: 2 Minutes
Respawn Delay: 5 SecondsIn the event of a 1-1 tie on rounds, the game must be ended and the team with most kills picks which spawn they want to play a final round.
Maps and Modes
Favela - Capture the Flag
Highrise - All modes
Invasion - All modes
Karachi - All modes
Scrapyard - All modes
Terminal - All modesBanned Weapons
Grenade Launcher
Claymore
C4
Secondary Launchers
Secondary Machine Pistols
Blast Shield
Tactical Insertion
Riot Shield
All Shotguns
LMG's
MMG's
P90Banned Perks
Bling
One Man Army
Painkiller
Final Stand
Martyrdom
Death Streak set to CopyCat