a. For towers outside of public rights-of-way, if the modification does not increase the height of the tower by the greater of: (a) more than 10 percent, or (b) by the height of one additional antenna array, with separation from the nearest existing antenna not to exceed 20 feet; or

b. For those towers in the rights-of-way and for all base stations, if the modification does not increase the height of the tower or base station by the lesser of: (a) 10 percent or (b) 10 feet.

a. For towers outside of public rights-of-way, if the modification does not protrude from the edge of the tower by the greater of: (a) 20 feet, or (b) the width of the tower structure at the level of the appurtenance; or

b. For those towers in the rights-of-way and for all base stations, if the modification does not protrude from the edge of the structure more than six feet.

a. For any eligible support structure, if the installation includes new equipment cabinets, the modification does not include the installation of more than four equipment cabinets; or

b. For towers in the public rights-of-way and base stations, if the modification does not involve the installation of any new equipment cabinets on the ground if there are no preexisting ground cabinets associated with the tower, and does not involve the installation of ground cabinets that are more than 10 percent larger in height or overall volume than any other ground cabinets associated with the tower.