A resident of the State who owns a dog or cat and who is eligible for the Food Stamp Program or the Social Security Disability Insurance Benefits Program shall be eligible to participate in the program at a reduced rate if the owner signs a consent form certifying that he or she is the owner of the dog or cat or is authorized by the eligible owner to present the dog or cat for the procedure. An owner must submit proof of eligibility to the Department. A resident of this State who is managing a feral cat colony and who humanely traps feral cats for spaying or neutering and return is eligible to participate in the program provided the trap, sterilize, and return program is recognized by the municipality or by the county, if it is located in an unincorporated area. The sterilization shall be performed by a University of Illinois College of Veterinary Medicine veterinarian or supervised veterinary student. The co-payment for the cat or dog sterilization procedure and vaccinations shall be $15.