83 Ill. Adm. Code 730.300
Construction
Section 730
Section 730.300 Construction
a) Each local exchange carrier shall place a minimum of 80% of
all newly constructed outside cable plant facilities (measured in sheath miles)
underground.
b) The telecommunications outside plant shall be designed,
constructed, maintained, and operated in accordance with the provisions of 83
Ill. Adm. Code 305 and 83 Ill. Adm. Code 265.