86 Ill. Adm. Code 495.120
Mobile Operations – Service Address
Section 495
Section 495.120 Mobile
Operations – Service Address
When the "service
address" is not a defined location, as in the case of mobile phones,
paging systems, or maritime systems, "service address" means the
customer's place of primary use as defined in the Mobile Telecommunications
Sourcing Conformity Act
[35 ILCS 638]. (Section 2(n) of the Act)