The students had strongly protested against the dress code directive.
"We do not want any drift with the students. They and their parents know what is the advisable dress," college rector John Abraham told reporters today.
A new dress code advisory put up today replacing the earlier advisory did not mention any specific clothes which the students cannot wear.
Bishop Ashok Biswas, who is part of the college council, said when the decision regarding the dress code was made, the students were present in the meeting.
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"The College recommends that students come to college in simple and unostentatious clothes suitable to an academic environment, taking into account India's rich culture, and the glorious heritage of this college, whose alumni include Swami Vivekananda, Netaji Subhas Chandra Bose, Manna De, to name only a few," the new notice says.
Asking students to wear clothes which reflects seriousness and importance of the learning environment, it says, "Students' attire is expected to be based on modesty, neatness, cleanliness and good taste on the campus."
It had allowed only full length trousers, skirts well below knee length and without slits.
Boys were barred to wear round neck T-shirts, earrings or any studs on ear, chin and nose.
The students' union had opposed the dress code saying it was imposed upon them without taking them into consensus.
"It was an autocratic decision by the rector and now he has suddenly revoked it and that too on a Sunday night. We will protest against it," Sayak Banerjee, general secretary of the union, said.