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. 

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. 

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. 

Article 18 - Commencement order 

## IMPLEMENTATION OF THE TASKS AND DELAYS 

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. 

Article 19 - Period of implementation of the tasks 

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. 

