Canada has issued an important update to its U.S. travel advisory that could affect travellers heading south.On Thursday, the Government of Canada updated its U.S. travel advisory, making changes to the entry and exit requirements. The latest update could impact First Nations persons and Native Americans born in Canada."You may be able to cross the Canada-U.S. border by land or water with your Secure Certificate of Indian Status (SCIS), also known as a secure status card," reads the update. "However, the acceptance of all status cards is entirely at the discretion of U.S. officials."It's also important to note that secure status cards aren't accepted travel documents for air travel. According to Indigenous Services Canada, the government started issuing status cards in 1956 as an official identity document confirming registration under the Indian Act.As a result, when crossing the U.S.-Canada border, travellers are strongly advised to bring a valid...