Wallace at the Customs Office will put the Den, Broken Hills and Redding on your world map. There's a number of ways in which you can enter the inner areas of Vault City:
* Stroll into the Customs Office at night, pick the locker and take the Day Pass.
* With Speech 75% or IN 7 you can convince Wallace you must see the First Citizen (just pick the long, eloquent dialogue choices). He'll give you a Day Pass.
* Offer to find the raider base. Do this (see Raiders) and return, Wallace will give you a Day Pass.
* Talk to Wallace wearing only your vault suit, or the Bridgekeeper's Robes, and he'll slap a Day Pass on you faster than a gecko on Jet. This happens automatically if you talk to him with IN<4.
* Tell Wallace you're a trader. If you have any (Golden) Gecko Pelts, (Refined) Uranium Ore or a Gold Nugget in your inventory you can show them to him, or if you have any humanoid party members other than Cassidy you can simply claim you're about to sell them into slavery. You can then fork out $500 for a Day Pass.
* Pickpocket Wallace for a Day Pass.
* If you know of the Jet problem in Redding, ask Wallace about Redding and say you know why the shipments have slowed. He'll give you a Day Pass.
* Talk to Skeev and buy False Citizenship Papers off him for $200 ($150 with Barter 50%), then threaten to expose him and he'll give you $300 back! This is by far the best option. You can turn him in to Wallace, but this requires giving up your False Citizenship Papers (with Barter 75% you can ask for a Day Pass in exchange).
* Talk to Skeev with an IN<4 character and you'll end up inside the vault as a "servant" (but you'll be able to leave without anyone reacting).
* If you destroyed the Enclave you'll be allowed to enter, even if you were previously banned.
a green starThe reason Wallace will see your vault suit under the Bridgekeeper's Robes is simply that the game forgets to check for it when determining if the character is "naked". This bug affects some dialogues slightly - Lynette and the President, to name a couple - but only has any real effect on Wallace and Dogmeat.
With a Day Pass you can enter the compound during daytime only (you'll be searched for drugs (Buffout, Psycho, Mentats or Jet) and alcohol (all 5 kinds)), but not enter the vault or use the largest shop. Also some people will throw you out if they find you after 6 p.m. With False Citizenship Papers you can enter without being searched and use the shop but not enter the vault. If you get a Day Pass from Wallace (in a legit manner) you can get new ones for $50 each should you need them, though I can't figure out a reason why you ever would. By the way, when entering using the False Citizenship Papers, don't make the mistake of calling the First Citizen a "he", or mentioning "all the vaults".
a green starMarcus and/or Lenny will not be allowed to enter the inner city unless you're Captain of the Guard. Incidentally, the guard's objections to them have been mixed up. Should you bring either of them inside anyway people will turn hostile, which is bad. Goris fits in just fine, apparently on account of his inconspicuous cloak.
a green star IN<4: There are many people downtown who'll get you permanently banished from Vault City if you talk to them and wait for them to call the guards, such as Lydia, Dr Troy, Lynette (even if you wear only the vault suit, though the conversation is different) and McClure. The "Shamble off" option should always get you safely out of a conversation, though sometimes you can only choose between being thrown out or resisting.