When should the verification of identity of clients be undertaken?

Updated 

Every reporting entity shall identify its clients, verify their identity, obtain information on the purpose and intended nature of the business relationship; and determine whether a client is acting on behalf of a beneficial owner, and identify the beneficial owner and take all steps to verify the identity of the beneficial owner, at the time of commencement of an account-based relationship and also verify identity while carrying out transaction of an amount equal to or exceeding rupees fifty thousand, whether conducted as a single transaction or several transactions that appear to be connected, or any international money transfer operations.