根据公式网站
http://www.sto.ca/index.php?id=357&L=en
2. NO U-PASSES will be accepted BEFORE 9 a.m. in non-designated zones. Have the cash fare ready as it will be required!
If you have a U-Pass, you can board an STO bus after 9 a.m. on weekdays and at any time on weekends. Boarding before 9 a.m. is...