Registration documentation requirements for service tax: identity, residence, constitution and authorisation proof required or application may be rejected. Applicants for service tax registration must submit a copy of the Permanent Account Number, proof of residence, evidence of the applicant's constitution, and a power of attorney for authorised persons; these documents must be filed with the registering authority within the prescribed short-period after application or the registration may be rejected. The statutory timeframe for the officer to grant registration runs from the date the application is complete with those documents.