80 Ill. Adm. Code 1110.120
Bargaining Unit Determinations
Section 1110
Section 1110.120 Bargaining
Unit Determinations
a) In determining the appropriateness of a unit for purposes of
collective bargaining, the Board shall consider all relevant factors,
including,
but not limited to, such factors as historical pattern of
recognition, community of interest, including employee skills and functions,
degree of functional integration, interchangeability and contact among
employees, common supervision, wages, hours, and other working conditions of
the employees involved, and the desires of the employees
(Section 7(a) of
the Act).
b) In cases where employees have historically been represented by
employee organizations for purposes of collective bargaining, such historical
pattern of recognition will not be negated or interfered with unless a majority
of the employees so represented express a contrary desire under the procedures
set forth in the Act and this Part.
c) Any party seeking to represent a bargaining unit limited to
employees of a craft shall submit a representation petition or intervening
claim pursuant to Section 7(a) of the Act supported by a 30 percent showing of
interest within the craft in the case of a petition seeking an election and a
showing of a majority interest within the craft in the case of a majority
interest petition. Whenever a party has so intervened, the Board shall proceed
in accordance with Section 1110.105(w) in the case of a majority interest
petition, and the election shall proceed in accordance with Section 1110.140(f)
in the case of a petition seeking an election.
d) Whenever a petition is filed alleging a bargaining unit that
includes professional and nonprofessional employees, the petition shall so
state. In the case of a majority interest petition, the Board shall proceed in
accordance with Section 1110.105(v) of this Part. In the case of a petition
seeking an election, the election shall be conducted in accordance with Section
1110.140(g) of this Part.