Unless provoked, any directly hostile/vilified faction towards the Chromeskulls (almost exclusively Union/"Corporate" entities) such as the Northeastern Union (NEU/USRF), Great Lakes Coalition-East (Bargetown/GLA) and New Model Army (MWU/NMA) should be exclusively avoided or "positively" (non-aggressively) interacted with while partaking in a startup/host in the same server.
"Corporate" groups or opposing gangs (Architects/Many Men respectively) fall under the same guidelines, but in most situations are O.K. to interactive with more extensively (cordial trade, minor interaction)
Chromeskulls are not allowed to enter hostile/vilified faction central locations (eg. Black Mountain Complex, Bargetown, Southpoint Estate/Village, etc...), as their heavy fortification and overwatch- alongside often having anti-Chromeskull laws and rules- make entering them nigh-on impossible.
Chromeskulls are allowed to enter hostile/vilified faction's minor locations (eg. Affiliated Townships [Trade Zone Minnow, Monroe's Ferry], trade zones, etc...) and friendly/allied faction's central/minor locations (eg. Alumni Campus, Voyageur's Cave and cells, etc...) with the only stipulation being that while inside any hostile/vilified faction's locations, you are required to remove all identification- conceal all concealable prosthetics, and not actively announce yourself in affiliation to the Chromeskulls- as it runs a high risk of you being found out and captured.
This stipulation also applies to any CRH-startup that include a variant of the rule "off-duty faction members allowed."
Chromeskulls are (now) permitted to travel across both the Northern and Southern islands, with the exclusion of Windernola and any smaller- unnamed islands.
All biomass locations (excluding Nowhere) are completely off limits outside of sanctioned Chromeskull events.
Disguises are also encouraged, as they reduce the chance of you being discovered signifigantly while traveling.
Following an IC under-the-table agreement with Bargetown and Hamilton, Chromeskulls have been quietly unbanned from the scraptown
To go into Bargetown as a Chromeskull, you must be undercover and without any visible identification (armbands, etc...)
You are encouraged to go to Bargetown when you have an idea of what you're planning to do; rather than just going for the sake of it
Corruption is rampant in Bargetown; so it's encouraged that you make use of it when in an uncomfortable situation
Universal spontaneous skirmish rules for any hostile/vilified factions include:
Default PTSK and PTC (APTSK/APTK and APTC should both sides OOCly agree to it.)
Default combat styles of DTB, with a fall back on D20 or another mutually agreed upon combat type.
IMRS "X.0" (varies) can be utilized as well should both parties agree to it. IMRS in any capacity should have at least one Flashstorm-affiliated community moderator (Junior Moderator+) in attendance, to make sure that no rules are being broken.
Gear should be relatively-balanced, meaning that not one side or the other has gear that exceeds the reasonable limitations of the spontaneous skirmish (only what characters have on them, etc....)
Faction staff (MR+/SR+ depending on attendees) from both parties are required to supervise any spontaneous skirmishes should they be kept to DTB/D20, with IMRS "X.0" (varies) requiring at least one Flashstorm-affiliated moderator (Junior Moderator+) to oversee (as previously stated.)
Any additional rules of engagement (ROE (such as Southpoint State's compound conversion clause)) can be found in the "ROE" section of the opposing factions description, in the diplomacy page.
Backup from either side is completely disallowed, meaning neither side can call for reinforcements in an IC-communications chat, hosting-hosting adjacent chat or otherwise. You are stuck with the amount of people who arrived/joined during the planning time.