By means of the borough committees, the corporation undertakes urban planning and maintains roads, government-aided schools, hospitals, and municipal markets.[135] As Kolkata's apex body, the corporation discharges its functions through the mayor-in-council, which comprises a mayor, a deputy mayor, and ten other elected members of the KMC.[136] The functions of the KMC include water supply, drainage and sewerage, sanitation, solid waste management, street lighting, and building regulation.[135]