The number is 1-603-4.
On day 6, an Obristan female entrant gives the inspector another slip followed by a note stating that Dari Ludum promised her and her sister work but will force her instead to work at the brothel. The inspector then has to decide whether or not to allow Ludum entry, or whether to have him detained by comparing his name to or giving him the woman's note.
Headlines on day 7 change depending the inspector's decision. If Ludum is detained, The Truth of Arstotzka will report that a human trafficking ring has been uncovered. If his entry is allowed or denied, dancers will be found dead. Regardless of the outcome, day 7 is the last time The Pink Vice is mentioned in the game.
All entrants that carry Pink Vice cards also carry valid paperwork, so it is impossible to receive a citation for approving them.