The Central Board of Secondary Education has removed a section on the 19th century Upper Cloth Revolt in South India from Class 9 textbooks after objections to “derogatory” references to women, The Telegraph reported on Monday. No questions from the controversial section in the social science textbook will be asked in 2017, according to a CBSE circular.

The “Upper Cloth Revolt” refers to a protest against a 19th century practice in Travancore, where Nadar men and women were not allowed to cover their upper body in front of members of higher castes.

Political parties such as the All India Anna Dravida Munnetra Kazhagam and Dravida Munnetra Kazhagam objected to details about the revolt mentioned in the textbook under the section “Caste Conflict and Dress Change”. The book said women of the Shanar caste were attacked by Nairs in public places in 1822 for wearing a cloth across their upper bodies. In 1829, the government of Travancore had directed Shanar women “to abstain in future from covering the upper parts of the body”, it added.

The textbook, published by the National Council for Educational Research and Training, is followed by the CBSE and 15 state boards. The book’s coordinator told The Telegraph that they had received no complaints from teachers or students about these references.