MATERIALS AND WORKMANSHIP  Article 24 -  Quality of supplies  24.1. The supplies must in all respects satisfy the technical specifications laid down in the  contract and conform in all respects to the drawings, surveys, models, samples, patterns  and other requirements in the contract, which shall be held at the disposal of the  contracting authority or the project manager for the purposes of identification throughout  the period of execution.  24.2. Any preliminary technical acceptance stipulated in the special conditions shall be the  subject of a request sent by the contractor to the project manager. The request shall  indicate the reference to the contract, specify the materials, items and samples submitted  for such acceptance according to the contract and indicate the lot number and the place  where acceptance is to take place, as appropriate. The materials, items and samples  specified in the request must be certified by the project manager as meeting the  requirements for such acceptance prior to their incorporation in the supplies.  24.3. Even if materials or items to be incorporated in the supplies or in the manufacture of  components to be supplied have been technically accepted in this way, they may still be  rejected if a further examination reveals defects or faults, in which case they must  immediately be replaced by the contractor. The contractor may be given the opportunity  to repair and make good materials and items which have been rejected, but such materials  and items will be accepted for incorporation in the supplies only if they have been  repaired and made good to the satisfaction of the project manager. 25.1. The contractor shall ensure that the supplies are delivered to the place of acceptance in  time to allow the project manager to proceed with acceptance of the supplies. The  contractor is deemed to have fully appreciated the difficulties which it might encounter in  this respect, and it shall not be permitted to advance any grounds for delay in fulfilling its  obligations.  25.2. The project manager shall be entitled to inspect, examine measure and test the  components, materials and workmanship, and check the progress of preparation,  fabrication or manufacture of anything being prepared, fabricated or manufactured for  delivery under the contract, in order to establish whether the components, materials and  workmanship are of the requisite quality and quantity. This shall take place at the place of  manufacture, fabrication, preparation or at the place of acceptance or at such other places  as may be specified in the special conditions.  a) provide the project manager, temporarily and free of charge, with such assistance,  test samples or parts, machines, equipment, tools, labour, materials, drawings and  production data as are normally required for inspection and testing;  b) agree, with the project manager, on the time and place for tests;  c) provide access to the project manager at all reasonable times to the place where the  tests are to be carried out.  August 2020 c4e_annexigc_en  Page 20 of 36  25.3. For the purposes of such tests and inspections, the contractor shall:  Article 25 -  Inspection and testing 