as the checkpoint inspector, the player reviews arrivals' documents and uses an array of tools to determine whether the papers are in order for the purpose of arresting certain individuals such as terrorists, wanted criminals, smugglers and entrants with forged or stolen documents; keeping other undesired individuals like those with no polio vaccine including anti-vaxxers, expired vaccines, missing required paperwork or expired paperwork out of the country; and allowing the rest through. for each in-game day, the player is given specific rules on what documentation is required and conditions to allow or deny entry which become progressively more complex as each day passes. one by one, immigrants arrive at the checkpoint and provide their paperwork. the player can use a number of tools to review the paperwork to make sure it is in order. when discrepancies are discovered, the player may interrogate the applicant, demand missing documents, take the applicant's fingerprints while simultaneously ordering a copy of the applicant's identity record in order to prove or clear either name or physical description discrepancies, order a full body scan in order to clear or prove weight or apparent biological sex discrepancies or find enough incriminating evidence required to arrest the entrant. there are opportunities for the player to have the applicant detained and the applicant may, at times, attempt to bribe the inspector. the player ultimately must stamp the entrant's passport (or temporary visa slip if the individual has no passport) to accept or deny entry unless the player orders the arrest of the entrant. if the player has violated the protocol, a citation will be issued to the player shortly after the entrant leaves. generally the player can make two violations without penalty, but subsequent violations will cost the player increasing monetary penalties from their day's salaries. the player has a limited amount of real time, representing a full day shift at the checkpoint, to process as many arrivals as possible.