Light Industrial (IL) district is established and intended to accommodate light manufacturing, assembly, fabrication , processing, distribution, storage, research and development, and other industrial uses that are small-scale or otherwise have minimal exterior movement of vehicles,
Read it in the chapter →How this ordinance defines it
The operative definition is the local one. Codes routinely subdivide a category into tiers — “day care 2, family”, “group home 2” — and attach different permissions to each, so only Portsmouth’s own text settles what this covers.