Revenue function: Revenue functions involve maintenance of land records, conduct of revenue cases, carrying out of demarcation and mutations and settlement operation. Deputy Commissioners and Additional District Magistrates are Collectors and Additional Collectors as per different Revenue Laws operating in Delhi. Sub Divisional Magistrates are designated as Assistant Collectors and Revenue Assistants and are primarily responsible for day to day revenue work. The subordinate revenue staff consisting of Girdawars, Kanungos and Patwaris are supervised by Tehsildars who are involved in field level revenue activities and mutations.

Issue of Certificates: Sub Divisional Magistrates are empowered to issue various kinds of statutory certificates including SC/ST & OBC, Domicile, and Nationality etc.

Registration of Property documents, Sale Deeds, Power of Attorneys, and all other documents, which need to be compulsorily registered as per law, is made at Sub Registrar’s Office, which are nine in numbers. Deputy Commissioners are Registrars for their respective districts and exercise supervisory control over the Sub Registrars.

Election Work: Deputy Commissioners are District Election Officers and Returning Officers for Parliamentary Constituencies. Additional District Magistrates and Sub Divisional Magistrates are Returning Officers for Assembly Constituencies and Electoral Registration Officers in respect of Voters’ Lists. The District Officers are primarily responsible for conduct of Lok Sabha and Assembly Elections. The District Administration is also responsible for maintenance and revision of Voters’ Lists, for issue of Voters’ Photo Identity Cards (EPIC Cards) and Voters’ Certificates.

Magisterial Functions: - Deputy Commissioners, Additional District Magistrates and Sub Divisional Magistrates exercise powers of Executive Magistrates. In this role they are responsible for operating preventive Sections of Code of Criminal Procedure. They also carry out inquiries into cases of unnatural deaths of women within seven years of marriage and issue directions to the Police for registration of case, if required.

Additional District Magistrates and Sub Divisional Magistrates are empowered to conduct inquiries into custodial deaths including deaths in Police lock up, Jails, Women Homes etc. The Officers of this Department are also expected to act as eyes and ears of the Government and conduct inquiries into all major accidents including major fires incidents, riots and natural calamities etc.

Registration of Marriage: - Deputy Commissioners, Additional District Magistrates and Sub Divisional Magistrates are conferred with powers of Registrars of Marriages under the Hindu Marriage Act and Special Marriage Act. This power is ordinarily exercised by the Additional District Magistrates who are responsible for registration and solemnization of marriages.

Relief, Rehabilitation and Disaster Management: - This department is given the primary responsibility for relief and rehabilitation operations in any calamity whether natural or man-made. Deputy Commissioners’ Offices carry out relief operations during flood, fires, crop failures, droughts and other calamities. It is also responsible for coordinating and implementing disaster management plan for natural and chemical disasters and awareness generation program on disaster preparedness is being carried out with the assistance of United Nations Development Program.