The Department shall establish and implement an Illinois Public Health and Safety Animal Population Control Program . The purpose of this program is to reduce the population of unwanted and stray dogs and cats in Illinois by encouraging the owners of dogs and cats to have them permanently sexually sterilized and vaccinated, thereby reducing potential threats to public health and safety. No dog or cat imported from another state is eligible to be sterilized or vaccinated under this program.
510 ILCS 92/20