b or 4A906.c. BIS is adding ECCN 4D906 towards the CCL to manage “program” “specifically built” or modified for your “improvement” or “manufacturing” of commodities managed by 4A906.b or 4A906.c. "Water issues. It really is a three device block with a flat roof. H2o drains throughout the roof in the top unit. H2o proofing must be