The document discusses opposition boards and the process for pre-grant and post-grant patent opposition in India. An opposition board is constituted by the Controller to examine a notice of opposition filed by an opponent. The board consists of three members including a chairman and examines statements, documents and evidence submitted by both parties. It then submits a report with its joint recommendation to the Controller. For pre-grant opposition, any person can file against the grant of a patent before it is granted. For post-grant opposition, an interested person can file within 12 months of a patent being granted. Both allow oppositions on grounds such as lack of novelty or inventive step.