[ Sign up for our Health IQ newsletter for the latest coronavirus updates ]The correspondence came a day after a letter to Tassi, signed by vice-president Mark Porter and obtained by The Canadian Press, which stated that the labour code provisions are “seriously detrimental” to its operations and “unduly prejudicial” to the company and its staff.The company said in an email last month the exemption would give it flexibility “to act in a timely manner” amid the pandemic.A labour code exemption would further scrap the union’s ability to request federal arbitration should the committee fail to yield fruitful solutions, Rauenbusch said.Air Canada has not withdrawn its application to the federal labour minister for an exemption, but has received.