¹The controller shall provide information on action taken on a request under  Articles 15 to 22 to the data subject without undue delay and in any event within one month of receipt of the request. ²That period may be extended by two further months where necessary, taking into account the complexity and number of the requests. ³The controller shall inform the data subject of any such extension within one month of receipt of the request, together with the reasons for the delay. ⁴Where the data subject makes the request by electronic form means, the information shall be provided by electronic means where possible, unless otherwise requested by the data subject.