By way of the Construction Lien Act Amendment Act, 2017, the name of Ontario’s Construction Lien Act was changed to the Construction Act1, lien expiry triggers and time-frames were changed, holdback provisions were significantly altered and sweeping new prompt payment and adjudication provisions were introduced. The changes are still being implemented over time, based on the “transition provisions” set out at s.87.3 of the Act. These provisions are tied, in part, to when the owner first procures or enters into a contract for the improvement. Unfortunately, the transition provisions gave rise to confusion and debate, particularly over whether “improvement” should be interpreted to involve, potentially, more than a single contract. 2