Daily stock account requirement mandates daily maintenance and five year preservation of production, inventory and duty records. Every assessee must maintain a daily stock account detailing goods produced, opening balances, production quantities, inventory, removals, assessable value, duty payable and duty paid; first and last pages must be authenticated by the producer, manufacturer or authorised agent. Records must be preserved for five years after the relevant financial year and may be kept in electronic form if each page bears a digital signature; the Board may prescribe conditions, safeguards and procedures for digitally signed records, with terms defined as per the Information Technology Act.