Under the Measures for Assessment of Taxi Service Quality and Reputation, which of the following infractions will trigger a direct, one-time maximum deduction of 20 points?

1. Failing to turn on the air conditioner when requested by a passenger
2. Using a forged, altered, or fraudulent Taxi Driver Qualification Certificate, or causing a traffic accident resulting in fatalities with primary or full liability
3. Failing to issue a printed computerized taximeter receipt
4. Taking an unapproved 500-meter detour due to road maintenance without informing the passenger