Ill. Admin. Code tit. 83, § 731.110 – Classifications of Carriers

a) Level 1 Carriers. For purposes of this Part, the following carriers shall be Level 1 carriers:
1. 1) LECs in the State of Illinois that provide wholesale service and have a preexisting plan; or
2. 2) LECs in the State of Illinois that have obligations pursuant to section 251(c) of the federal Telecommunications Act, with 400,000 or more subscriber access lines in service; or
3. 3) LECs in the State of Illinois that provide wholesale service and are directed pursuant to a Commission order to comply with all of the requirements of Subparts B, C, D, and E pursuant to Section 731.635.
b) Level 2 Carriers. For purposes of this Part, Level 2 carriers are those LECs in the State of Illinois that provide wholesale service and satisfy each of the following requirements:
1. 1) Have obligations pursuant to section 251(c) of the federal Telecommunications Act, with fewer than 400,000 subscriber access lines in service;
2. 2) Do not have a preexisting plan;
3. 3) Do not have a wholesale service quality plan approved by the Commission pursuant to Subpart E;
4. 4) Have not been directed pursuant to a Commission order to comply with all of the requirements of Subparts B, C, D, and E pursuant to Section 731.635; and
5. 5) Do not have a currently effective rural exemption.
c) Level 3 Carriers. For purposes of this Part, Level 3 carriers are those LECs in the State of Illinois with a rural exemption from the obligations of section 251(c) of the federal Telecommunications Act.
d) Level 4 Carriers. For purposes of this Part, Level 4 carriers are those LECs in the State of Illinois that do not have obligations pursuant to section 251(c) of the federal Telecommunications Act and are not Level 3 carriers.