GST exemption scope on IIM programmes: long duration degree/diploma courses exempt, short executive courses taxable. Following the IIM Act, all scheduled IIMs qualify as educational institutions; services to students in long duration programmes (one year or more) that confer a legally recognised degree or diploma are exempt from GST, while short term executive programmes providing only participation certificates are taxable. Transitional provisions limited exemptions before statutory recognition, overlapping notifications allowed choice of the more favourable exemption during a defined period, and the circular aligns state and corresponding central/UT exemption entries.