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If historic buildings other than historically interpreted buildings owned by a governmental unit or privately owned undergo alterations which cost more than 15 percent of the reproduction cost of the public facility as defined in Section 18-11-1102.1, the following items shall comply with the requirements for new construction:
1. The element or space being altered.
2. An entrance and a means of egress intended for use by the general public.
3. Horizontal and vertical accessible routes between an entrance or means of egress and the parts being altered.
4. If toilets are required in the facility, at least one accessible toilet room for each sex complying with Section 18-11-1109.2; or, if permitted by the Illinois Plumbing Code, at least one unisex toilet room.
5. If parking is provided, accessible parking spaces complying with Section 18-11-1106.
6. If accessible parking spaces are provided, an accessible route from the accessible parking spaces to an accessible entrance.
7. Alternative requirements of Section 18-11-1118.2.3 may be substituted for the requirements for new construction if deemed necessary by the Illinois Historic Preservation Agency or the Commission on Chicago Landmarks.
(Amend Coun. J. 7-26-06, p. 81373, § 1)