When a contractor is asked to submit a bid pursuant to a call for tenders, it obviously must ensure that it holds all the licence classes required for the planned project. Generally, tender documents do not specify the numbers of the required licences, leaving it up to bidders to determine them. The client will, however, require a declaration from each bidder stating that it holds all required licences and is in compliance with applicable legislation. To determine which licences are required, bidders must determine the main purpose of the call for tenders, i.e. the nature of the proposed work. In some cases, each bidder must determine if the licences it holds will allow it to perform the related work, or if it risks being disqualified, or legal sanctions if its bid is successful.