The mayors of municipalities and municipal council members were elected. Colorado municipalities operate under one of five types of municipal governing authority. Property taxes are levied by municipalities for the support of education and municipal services. The sessions of the Municipal Council are public. The departments are further divided into communes, governed by municipal councils. Bismarck operates under the city commission style of municipal government. Yekaterinburg has an extensive network of municipal, regional and federal health facilities. Towns are limited to town board type of municipal government. The laws governing the taxability of municipal bond income are complex. The municipal council applies to all people living in the municipal area. The center trains students for careers in municipal, county and regional governments. It is now widely used for municipal and industrial wastewater treatment. One is mediation between national and municipal governments. Nitrification also plays an important role in the removal of nitrogen from municipal wastewater. The borough corporation was reformed under the provisions of Municipal Corporations Act 1835.