A class G1, G2, M1 or M2 driver may be required to attend an interview to discuss his/her record and give reasons why their licence should not be suspended

A when 6 demerit points have been accumulated.

explanation

See https://www.ontario.ca/laws/regulation/940339 and section 'Demerit-point System for Level 1 and Level 2 Drivers' in the official MTO Driver's handbook. Pay attention that the question refers to Level 1 and Level 2 drivers, NOT fully licensed drivers.