claim brought by any third party including creators and intermediaries for alleged or  actual violations of intellectual, industrial or other property rights of any kind whatsoever  based on the contracting authority's use as specified in the contract of patents, licenses,  drawings, designs, models, or brand or trademarks, except where such infringement  results from compliance with the design or specification provided by the contracting  authority. Such licence shall carry the right to grant sub-licences and shall be transferable by the  contracting authority to third parties without the consent of the contractor being required.  All industrial, intellectual and other property rights (including but not limited to patent  rights and copyright) developed in connection with the tasks by or on behalf of the  contracting authority, including but not limited to any rights in any documents prepared  for the purpose of the contract or the tasks, shall remain vested in the contracting  authority but the contractor shall have the right at its cost to copy, use and obtain  communication of these documents for the purpose of the contract.  Upon and notwithstanding any termination of the contract howsoever arising, as well as  after completion of the tasks, the contracting authority shall continue to have the benefit  of the licence referred to in Article 17.2, first paragraph.  17.2. All industrial, intellectual and other property rights (including but not limited to patent  rights and copyright) developed in connection with the tasks by or on behalf of the  contractor, including but not limited to any rights in any documents prepared for the  purpose of the contract or the tasks, shall remain vested in the contractor but the  contracting authority shall have an irrevocable, royalty-free, non-exclusive licence of the  above-mentioned rights for the purpose of the contract.  18.1. Subject to the special conditions, the contracting authority shall fix the date on which  implementation of the tasks is to commence and advise the contractor thereof either in the  notification of award of the contract or by administrative order.  18.2. Save where the parties agree otherwise, implementation of the tasks shall begin no later  than 90 days following notification of award of contract. Unless this delay results from  the contractor default, after that date the contractor shall be entitled not to implement the  contract and to obtain its termination and/or compensation for the damage it has suffered.  The contractor shall forfeit this right unless it exercises it within 30 days of the expiry of  the 90-day period.  19.1. The period of implementation of tasks shall commence on the date fixed in accordance  with Article 18 and shall be as laid down in the special conditions, without prejudice to  extensions of the period which may be granted under Article 20.  19.2. If provision is made for distinct periods of implementation of the tasks for separate lots,  in cases where one contractor is awarded more than one lot per contract, the periods of  implementation of the tasks for the separate lots shall not be accumulated.  August 2020 c4e_annexigc_en  Page 15 of 36  IMPLEMENTATION OF THE TASKS AND DELAYS  Article 18 -  Commencement order  Article 19 -  Period of implementation of the tasks 