55. A job class shall be considered predominantly female or predominantly male if 60% or more of the positions in that class are held by employees of the same sex.
A job class may also be considered predominantly female or male if
(1) the difference between the rate of representation of women or men in the job class and their rate of representation in the total workforce of the employer is considered significant;
(2) the historical incumbency of the job class in the enterprise indicates that it is a predominantly female or predominantly male job class; or
(3) owing to gender stereotypes of fields of work, the job class is commonly associated with women or men.