advertising structure means any screen, fence, wall or other physical structure or object erected to display an advertisement or which is in itself an advertisement or used to display an advertisement.
utility structure means transmission and distribution lines
Existing structure means any structure that is installed or approved for installation at the time a
Nominal tomographic section thickness means the full width at half-maximum of the sensitivity profile taken at the center of the cross-sectional volume over which x-ray transmission data are collected.
Permanent structure means a permanent building or permanent structure that is anchored to a permanent foundation with an impermeable floor, and that is completely roofed and walled (new structures require a door or other means of sealing the access way from wind driven rainfall).