HAMILTON, Canada — Transgender people are effectively barred from flying on Canadian flights due to an obscure rule change that came to light last week.

Queer community and transgender blogs blew up with news that under the obscure identity screening regulations for air passengers in Canada, travelers whose gender identity on their identification doesn’t match their person will not be allowed to board a Canadian airline.

“We cannot allow regs which judge people based on how they ‘appear’ to be gendered; it is unacceptable,” wrote Christin Milloy, a trans activist on her blog. Milloy led the early outrage online over the regulations. An online petition has since been started calling for a repeal of the exclusion.