Hello dear
Allen kota have their own dress for the both girls and boys students. For girls it's grey kurti with Black pajama and for boys it's grey colour shirt with black full pant. There is also green colour t-shirt which is provided to both girls and boys students which they can wear with jeans or pants what particular boys or girls like. Girls can wear leggings of their choice too.
These all dress will provided by the institute itself free of cost.
So most of days you will have to wear that otherwise guard will stop you and may not let enter if you don't follow the roles.
So yeah you will have to wear any of two dress for compulsory either kurti pajama or green allen t-shirt with jeans/leggings. You can skip some day with regular dress but for that you must carry your Allen I'd card and also you should have good excuse to tell to teachers or guard's there.
Hope this information helps you
All the best !!
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