After 30 years of letting employees wear baseball caps with the union logo, Air Canada unilaterally implemented a new rule requiring that all ball caps worn at work bear the company logo. The union claimed the policy was unreasonable and violated employees’ rights under the collective agreement. Air Canada contended the new policy was a necessary part of its rebranding campaign. The arbitrator sided with the union. While presenting a harmonized and professional image to the public was a reasonable goal, Air Canada provided no evidence to show the new hat policy was necessary to achieve that goal or explain why it applied to “below the wing” positions that were non-public facing [Air Canada v IAMAW District Lodge 140, 2019 CanLII 5917 (CA LA), Jan. 31, 2019].