Customs Broker eligibility requires prescribed application, qualifications, financial viability proof, and no criminal or penalty history for licence. Regulation 4 requires applications for a Customs Broker licence to be invited by NACIN, filed in prescribed Form A with the prescribed fee to the Principal Commissioner or Commissioner of Customs for the applicant's intended business jurisdiction, and processed following NACIN examination. Regulation 5 prescribes eligibility: Indian citizenship, sound mind, no insolvency adjudication, Aadhaar and PAN, financial viability evidenced by bank certificate or acceptable proof of assets at or above the prescribed threshold, prescribed educational or professional qualifications or specified industry experience, and absence of criminal convictions, pending criminal proceedings or penalisation under specified tax and customs enactments.