40 ILCS 5/12-119

"Transferred employee": An employee who was transferred to the employment of a city by virtue of "An Act in relation to an exchange of certain functions, property and personnel among cities and park districts having coextensive geographic areas and populations in excess of 500,000", approved July 5, 1957, as amended. A park policeman shall not be included as being a transferred employee within the meaning of this Article.