28 CFR Part 36 Nondiscrimination on the Basis of Disability by Public Accommodations and in Commercial Facilities (1991 ADA Title III Regulations)

(c) Illustrations of conduct prohibited by this section include, but are not limited to:

(1) Coercing an individual to deny or limit the benefits, services, or advantages to which he or she is entitled under the Act or this part;

(2) Threatening, intimidating, or interfering with an individual with a disability who is seeking to obtain or use the goods, services, facilities, privileges, advantages, or accommodations of a public accommodation;

(3) Intimidating or threatening any person because that person is assisting or encouraging an individual or group entitled to claim the rights granted or protected by the Act or this part to exercise those rights; or

(4) Retaliating against any person because that person has participated in any investigation or action to enforce the Act or this part.