A charge of discrimination must be filed within 300 days after the alleged discriminatory action, or one year for a Fair Housing case. You have 365 days from the last incident to file a claim with the CCHR.Your employer must have at least 1 employee. The ADEA protects individuals who are 40 years of age or older from discrimination in any aspect of employment. Key aspects of age discrimination: 1. The Age Discrimination in Employment Act (ADEA) forbids age discrimination against people who are age 40 or older. Age discrimination legally only includes workers 40 or older. This law prohibits employers with 20 or more employees from discriminating against individuals aged 40 and above. The Illinois Human Rights Act (IHRA) prohibits employers from age discrimination in recruiting, hiring, promoting, and terminating. The Illinois Human Rights Act (IHRA) prohibits age discrimination against employees and job applicants who are 40 years old or older.