Illinois Statutes Chapter 225. Professions,Occupations and Business Operations § 310/4.2. Interior technical submissions

(a) All interior technical submissions intended for use in this State shall be prepared and administered in accordance with standards of reasonable professional skill and diligence. Care shall be taken to reflect the requirements of State law and, where applicable, county and municipal ordinances in the submissions. In recognition that registered interior designers are registered for the protection of the public health, safety, and welfare, submissions shall be of such quality and scope, and be so administered, as to conform to professional standards.

(b) No officer, board, commission, or other public entity who receives interior technical submissions shall accept for filing or approval any interior technical submissions related to services requiring the involvement of a registered interior designer that do not bear the seal and signature of a registered interior designer.

(c) It is unlawful to affix a seal to interior technical submissions if it masks the true identity of the person who actually exercised responsible control of the preparation of such work. A registered interior designer who seals and signs interior technical submissions is not responsible for damage caused by subsequent changes to, or uses of, those interior technical submissions where the subsequent changes or uses, including changes to uses made by State or local agencies, are not authorized or approved in writing by the registered interior designer who originally sealed and signed the interior technical submissions.