On October 15, 2008 the Lawrence County Board enacted an ordinance 2008-14 to establish the Lawrence County Emergency Telephone System Board as the Addressing Authority of Lawrence County.  This is in accordance of Illinois Statutes (55ILCS 5/5-1067) (from Ch. 34, par. 5-1067).  This ordinance also adds provisions for the numbering of buildings and dwellings.

In summary, the Lawrence County Ordinance 2008-14 states that within 60 days after the receipt of notification of a new E911 address, the owner or occupant of that address must affix the number to the structure if visible from the road, or to a sign or number post if not visible from the road, in such a manner that the numbers can be clearly
seen day or night. If the address sign needs to be located at the entrance to the structure from the road, it must be located on the same side of the road. There are restrictions on number height, 3 inches minimum, and must have a contrasting background color. Addresses outside a municipality must use 3 inch high reflective numbers with a contrasting background color assigned by the fire district in which the structure is located.

INFORMATION REGARDING E911 ADDRESS NUMBER SIGNS SUMNER AREA
( ADDRESSES OUTSIDE A MUNICIPALITY )
To maintain conformity and reduce the public burden, ALL rural Sumner area
zip code address number signs will be premade with the address number printed on both sides of the sign. The address number signs can be purchased at cost for approximately $7.  Addressing signs will be made available for those residents outside of a municipality in the 62466, 62421, and 62476 zip codes soon.  
These address signs meet ETSB and Lawrence County rural addressing regulations. The address signs will be sold at cost for $7.

Rural (outside a municipality) address sign examples:

(Lawrence Allison FD - 3 inch high reflective white numbers with red background)
Example: Lawrence Allison Fire District   ( 18" high x 6" wide )

(Bridgeport FD - 3 inch high reflective white numbers with royal blue background)
Example: Bridgeport Fire District  ( 18" high x 6" wide )

(Denison FD - 3 inch high reflective black numbers with orange background)
Example: Denison Fire District  ( 18" high x 6" wide )

(Christy FD - 3 inch high reflective white numbers with green background)
Example: Christy Fire District  ( 18" high x 6" wide )

Lawrence County E.T.S.B. Addressing Authority
Rural Address Sign Conformity Regulations:

Rural address signs must have the background color and address number on
BOTH SIDES so that it can be clearly seen from either direction from the roadway.

Address sign posts must not be placed within any county or township right-of-way.
Place the sign post at or on the right-of-way line. Right-of-ways vary from township to township. Contact your township supervisor if unsure.  Most right-of-ways are at least 10 feet from the edge of the roadway.  You may need to contact JULIE INC for buried cable locates at 1-800-892-0123 or visit Ilinois1call.com to request online before you dig or place your sign post into the ground. Many areas have fiber optic, telephone lines, gas, water, or electrical lines buried within or near road right-of-ways.

Address signs must be placed on the same side of the road no more than twenty feet
( 20' ) from either direction of the drive way entrance.

Address signs must be eighteen inches ( 18" ) by six inches ( 6" ) in size.
The bottom edge of the address sign must be at least three feet ( 3' ) above ground and not to exceed four ( 4' ) feet above ground.

Multiple residents with one private drive way must post a sign at the road entrance that shows the beginning and ending address numbers ( Example: 1000 - 1010 ) and post each individual address number at each residence.  Contact Lawrence County E911 for these special entrance signs.

County addressing numbers do not exceed 5 digits.

The full address ordinance requirements can be read here.