In Massachusetts, you must file your claim within 300 days after you experienced a discriminatory act. Learn how to prove disability discrimination and protect your rights with help from our Boston disability discrimination lawyers.You must file a complaint of employment discrimination within 300 days. Under Massachusetts and federal laws, an employer cannot discriminate against a qualified individual with a disability based on that disability. Massachusetts state and federal law prohibit handicap discrimination in the workplace. Free Consultation - Call (617) 521-8600. Disability discrimination is illegal – employers have accommodation requirements. Within 300 days of the act of discrimination, file a complaint with either the Equal Employment. Both state and federal laws prohibit disability discrimination in the workplace. Employment disability discrimination is prohibited under Massachusetts and federal laws.