Imported boric acid consignments must comply with BIS standard; customs to ensure specification, packaging and testing. Imported consignments of Boric Acid (Technical Grade) must conform to the Indian Standard for boric acid and bear the Standard Mark under a BIS licence; customs officers are instructed to check imported consignments for strict compliance with the specification, including compositional limits for polishing compounds (chloride and sulphate) and packing requirements (jute bags with liners). BIS is the certifying and enforcing authority and the Standard prescribes grades, analytical methods, sampling, testing procedures and lot-conformity criteria.