(64)The examination of those requests to participate should normally be performed within a maximum of 10 working days, given that the evaluation of the selection criteria will take place on the basis of the simplified requirements for documentation that are set out in this Directive. However, when a dynamic purchasing system is first set up, contracting authorities might, in response to the first publication of the contract notice or the invitation to confirm interest, be faced with such a large number of requests for participation that they would need more time to examine the requests. That should be admissible, provided that no specific procurement is launched before all the requests have been examined. Contracting authorities should be free to organise the way in which they intend to examine the requests for participation, for instance by deciding to conduct such examinations only once a week, provided the deadlines for the examination of each request of admission are observed.