Expanded local calling (ELC) service allows customers primarily in rural exchanges to have a larger local calling scope. For many rural areas, services within much of the community of interest (schools, doctors, county government, and hospitals) were outside the normal local calling areas, and calls to these locations were long-distance. Cities or customers within local calling areas can petition for ELC calling to adjacent exchanges. Petitions must confirm a community of interest with signatures and majority of customers that will encounter additional charge for extended calling must agree. If the cost of providing ELC service exceeds the revenues the company offering the service receives, state law allows the telephone company to surcharge all of its customers in the state to cover the lost revenue.