About this work
What does the threshold actually require?
Three things, and each word in it is doing work. Under subsection 267.5(5) of the Insurance Act the owner, the occupants and any person present are not liable for non-pecuniary loss unless the injured person died or sustained permanent serious disfigurement, or permanent serious impairment of an important physical, mental or psychological function.
Permanent, so an injury that resolves does not qualify however painful it was at the time. Serious, which is assessed against what the person can no longer do. And of an important function, which is where the evidence usually concentrates: what the impairment prevents in the person's actual work, family and daily life rather than in the abstract.
A psychological impairment counts. So does one that is not visible on any scan. What matters is the evidence, and the evidence is built from treating records over time rather than from a single assessment near the start.
Because the threshold is judged on the state of affairs as it turns out, a claim that looks marginal at six months can look very different at two years. That is a reason to keep the file moving and the treatment documented, not a reason to wait past the limitation period.