This document summarizes regulations and policies governing India's defence and aerospace sectors. It notes that India imports 60% of its defence equipment and spends over $40 billion annually on defence. The government's policies aim for self-reliance in defence production and making India a defence sourcing hub. The aerospace sector is also growing and aims to be the largest civil aviation market globally by 2030. The document outlines the legal roadmap for entering these sectors including market entry regulations, import/export rules, and regulatory environments for civil aviation MRO and defence procurement.