As far as I know and understand the Law in India; any activity that involves catching wildlife of any sort needs to be sanctioned by the relevant State Biodiversity Board (in the state where the sampling is to happen which may not be the state in which an institution is situated). This is called a "Form 1". Publication of results can be very problematic if this is not obtained. If at a future date, you need to export any specimens for taxonomic study, you will need to have the Form 1 in place before you apply to the National Biodiversity Board in Chennai
Yes. otherwise it will be difficult to publish your result. More so, if you work requires any kind of experimental work and you are required to collaborate with some other lab in india or abroad. It becomes more complicated if you are working on some scheduled species.
Not true. Under the Biodiversity Act, Indian nationals can make collections of biodiversity of their localities, especially if it is for non-commercial purposes. The only requirement is to inform the State Biodiversity Board by letter and reply to their questions, if any. Regarding the Wildlife Protection Act 1972, it protects the species listed on the various Schedules. Regarding the Forest Act, protection is extended to Reserve Forests and National Parks, where one cannot collect anything without permission. Outside such areas, no permission is required, especially if the species concerned are not on the Schedules. Do read my review of Butterflies of the Garo Hills (Journal of the Bombay Natural History Society 2014) for further details.