There should be an "or" before the word "packing" if "packing for shipment or distribution" is a single phrase (rather than two alternatives). The Oxford Comma

There should be an "or" before the word "packing" if "packing for shipment or distribution" is a single phrase (rather than two alternatives). The Oxford Comma debate is a sideshow. It's all about where you find the "or", which indicates the last choice.