CSC prison drug-control strategies are designed to reduce the drug supply into prisons and inmate demand for drugs. Existing drug laws are being used in innovative ways to deal with inmates and visitors involved in the prison drug trade. Thorough drug searches are conducted of inmates, visitors, and staff. Random drug testing is conducted, and CSC is working with police and Crown prosecutors to ensure serious consequences for law breakers. A prevalent problem being addressed is called "throw-overs," which involves drug packets being tossed or otherwise hurled over prison walls and fences into prison yards. Inmates distribute these drugs to other inmates. Efforts to counter this practice include gaining the cooperation of residents who live close to prisons. They are asked to report to designated prison staff any strangers on their property and any observation of objects being thrown into prison yards. In addition, foliage has been removed from prison perimeters and additional camera equipment has been installed. Motor patrols around prisons have also been increased. Another important part of the drug-control strategy is to reduce inmate demand for drugs through inmate drug treatment programs. At CSC intake/assessment centers, new inmates are assessed to determine their need for specific types of drug and alcohol treatment. A variety of treatment programs are available in prison, including the Methadone Maintenance Treatment. Begun in 1997, this program has been effective in dealing with opiate addiction.