or maintenance of aids to navigation that are authorized by governmental authority; 8. Emergency measures decreed by any duly appointed Health Officer of a governmental subdivision acting to protect the public health; 9. The normal maintenance
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 Fredericksburg’s own text settles what this covers.