For the purposes of this article, the following words and phrases shall have the following meanings:
(1) DISCRIMINATORY PRACTICE. Any practice made unlawful by this article.
(2) EMPLOYER. Any person employing 20 or more employees for each working day in each of 20 or more calendar weeks in the current or preceding calendar year, including any agent of that person.
(3) EMPLOYMENT AGENCY. Any person regularly undertaking, with or without compensation, to procure employees for an employer or to procure for employees opportunities to work for an employer, including any agent of that person.
(4) LABOR ORGANIZATION. Any organization which exists for the purpose, in whole or in part, of collective bargaining, of dealing with employers concerning grievances, terms, or conditions of employment, or of other mutual aid or protection in connection with employment.