Twitter has ended on-site blood drives to protest a Federal Drug Administration (FDA) policy that prohibits gay and bisexual men from donating blood.

The FDA prohibits men who have sex with men from donating blood unless they have been celibate for one year. A previous lifetime ban was adopted in 1983 in response to the AIDS crisis.

“These are the only policies that the FDA has based on a person's identification and not any type of risky behavior that they're engaged in,” said Jim Halloran, associate manager of sales operations at Twitter and president of the company's LGBT affinity group TwitterOpen.

The decision to no longer hold on-site blood drives came after a gay company employee was turned away from a drive being held at Twitter's headquarters.

Brian “Skip” Schipper, vice president of human resources at Twitter, called the FDA policy “unnecessary and discriminatory” in comments to the International Business Times.

Twitter has also filed a public comment against the policy with the FDA.