225 ILCS 441/5-20
The Department may, in its discretion, license as a home inspector, by endorsement, on payment of the required fee, an applicant who is a home inspector licensed under the laws of another state or territory, if (i) the requirements for licensure in the state or territory in which the applicant was licensed were, at the date of licensure, substantially equivalent to the requirements in force in this State on that date or (ii) there were no requirements in force in this State on the date of licensure and the applicant possessed individual qualifications on that date that are substantially similar to the requirements under this Act. The Department may adopt any rules necessary to implement this Section.
Applicants have 3 years after the date of application to complete the application process. If the process has not been completed within 3 years, the application shall be denied, the fee forfeited, and the applicant must reapply and meet the requirements in effect at the time of reapplication.
225 ILCS 441/5-20