Special packing provisions PP38 and PP100:
PP38: For UN 1309, bags are permitted only in closed cargo transport units or as unit loads.

PP100: For UN numbers 1309, 1323, 1333, 1376, 1408, 1435, 1449, 1457, 1472, 1476, 1483, 1509, 1516, 1567, 1869, 2210, 2793, 2858, 2878, 2950, 2968, 3089, 3096 and 3125, flexible, fibreboard or wooden packagings shall be sift-proof and water-resistant or shall be fitted with a sift-proof and water-resistant liner.