Complex sentence: This practice was permanently discontinued on May 1,2012, at which point passengers are required to pay a boarding fare upon each boarding or get an all-day, seven-day, 30-day or monthly pass.
Split into simpler sentences: This practice was permanently discontinued on May 1,2012. After that date, passengers are required to pay a boarding fare upon each boarding or get an all-day, seven-day, 30-day or monthly pass.