1 of 3 | The five judges on the Court of Appeals ruled that the ban on the organization Palestine Action under the Terrorism Act is “justified and proportionate.” File Photo by Hugo Philpott/UPI | License Photo

June 15 (UPI) -- The British Court of Appeals ruled Monday that the ban on the pro-Palestine organization Palestine Action is lawful and upheld its designation as a terrorist organization.

The five judges on the Court of Appeals ruled that the ban on the organization under the Terrorism Act is "justified and proportionate." The proscription of Palestine Action as a terrorist organization makes supporting the group punishable by up to 14 years in prison.

More than 2,500 members of the group have been arrested.

Huda Ammori, the co-founder of Palestine Action who originally challenged the ban in court, said she plans to appeal the ruling in the British Supreme Court.