There are exceptions. Someone who was up until recently a teacher may fall into the category of being in a position of trust or authority towards the minor. Without knowing the legal precedents, it’s hard to know how much of an edge case this is.

From the JusticeThe following factors may be taken into account when determining whether a relationship is exploitative of the young person:

From the* Justice Canada webpage on Age of Consent*

Sexual exploitation A 16 or 17 year old cannot consent to sexual activity if:

• their sexual partner is in position of trust or authority towards them, for example their teacher or coach
• the young person is dependent on their sexual partner, for example for care or support the relationship between the young person and their sexual partner is exploitative

The following factors may be taken into account when determining whether a relationship is exploitative of the young person:

• the young person's age
• the age difference between the young person and their partner
• how the relationship developed (for example, quickly, secretly, or over the internet)
• whether the partner may have controlled or influenced the young person