The American Correctional Association is an association of providers of services to prisons in the United States. It holds an annual trade show where products used in prisons are shown to prospective purchasers. An allied organization is the American Legislative Exchange Council, ALEC, which conducts an active lobbying program in state legislatures advocating prison programs such as Truth in Sentencing, mandatory sentences, or support for private prisons. About 1/3 of the members of state legislatures are members of ALEC.