By Francois ‌Murphy

VIENNA, Dec 11 (Reuters) - Austria's lower house of parliament on Thursday passed a ban ‍on Muslim ‌headscarves in schools for girls under 14 despite uncertainty over whether the legislation will ⁠be ruled unconstitutional as a previous ban ‌was five years ago.

The ban, proposed by the ruling coalition of three centrist parties, was also backed by the far-right Freedom Party, which was alone in calling for it to apply to school staff ⁠as well. The only party to oppose the proposed ban was the smallest in parliament, the Greens, arguing it ​violates the constitution.

Rights groups have criticised the plan. Amnesty International ‌said it would "add to the current racist ⁠climate towards Muslims". The body that officially represents Austria's Muslims has called it an infringement of fundamental rights.

"This is not about restricting freedom, but about protecting the freedom ​of girls up to 14," Yannick Shetty, the parliamentary leader of the liberal Neos, the most junior party in the ruling coalition, told the lower house.

"It (the headscarf) is not just an item of clothing. It serves, particularly with minors, to shield girls from the ​male gaze. ‍It sexualizes girls," he said.

The ​junior minister for integration, Klaudia Plakolm of the conservative People's Party, which leads the ruling coalition, called headscarves for minors "a symbol of oppression".

Austria's Constitutional Court ruled in 2020 that a previous ban, which applied to under-10s in schools, was illegal because it discriminated against Muslims and the state has a duty to be religiously neutral. Going against that principle requires special ⁠justification, it held.

Shetty said the government had commissioned a study that is still under way in an effort to meet that requirement, ​without elaborating on its content.

Education Minister Christoph Wiederkehr of the Neos said young girls were coming under increasing pressure from their families -- and also from unrelated young boys -- who tell them what to wear for "religious reasons".

The Greens' deputy parliamentary ‌leader, Sigrid Maurer, agreed that is a problem, and suggested interdisciplinary teams including representatives of the Muslim community be set up to intervene in schools when "cultural tensions" flare.

(Editing by William Maclean)