The Government of India has notified six documents as ‘Officially Valid Documents (OVDs) for the purpose of producing proof of identity. These six documents are Passport, Driving Licence, Voters’ Identity Card, PAN Card, Aadhaar Card issued by UIDAI and NREGA Card. You need to submit any one of these documents as proof of identity. If these documents also contain your address details, then it would be accepted as as ‘proof of address’. If the document submitted by you for proof of identity does not contain address details, then you will have to submit another officially valid document which contains address details.
Aadhar card is now accepted as valid proof of identity.
An account can be opened by submitting a copy of any one of the following documents:
(i) Identity card with person’s photograph issued by Central/State Government Departments, Statutory/Regulatory Authorities, Public Sector Undertakings, Scheduled Commercial Banks, and Public Financial Institutions; or
(ii) letter issued by a gazetted officer, with a duly attested photograph of the person.
This, however, is not a general rule and it is left to the judgement of the banks to decide whether this simplified procedure can be adopted in respect of any customer.
You can open a bank account in a city other than the city for which you have permanent address ID proof. In that case, you can submit an officially valid document (proof of address document) of your permanent city address together with a declaration about your current address, for communication purposes. http://rbidocs.rbi.org.in/rdocs/notification/PDFs/CA090614FCN.pdf
KYC is required to be done at least every two years for high risk customers, at least every eight years for medium risk customers and ten years for low risk customers.
For more details see rbi page http://www.rbi.org.in/scripts/FAQView.aspx?Id=82