Register of authorised income-tax practitioners must be maintained in the prescribed form and manner for registration records. Every specified authority must maintain a register of authorised income-tax practitioners who have been issued certificates of registration under rule 257. The register must be kept in the form and manner specified by the Principal Director General of Income-tax (Systems) or the Director General of Income-tax (Systems), as the case may be, with prior approval of the Board. The provision governs the record-keeping obligation connected with registration of income-tax practitioners.