The insurer appealed the Divisional Court’s decision that the limitation period on IRBs did not commence because the denial did not provide any medical reasons. The insurer argued that the only basis for denial was the claimant’s return to work (i.e. an “other” reason), and that it was not required to state a medical reason where one did not exist. The Court of Appeal agreed, reversing the Divisional Court’s decision. The Court held that the phrase “medical and any other reason” used the word “and” in a joint and several sense. The Court recognized that some cases will have both medical reasons and other reasons; some cases will have only medical reasons or only other reasons. The insurer was not required to invent a medical reason for the denial where one did not exist. The denial of further IRBs based on the return to work complied with section 37, and was sufficiently clear and unequivocal to trigger the limitation period.