CONTRACTOR may be called upon to provide technical assistance services to OWNER for the first year of operation of the PLANT from the PROVISIONAL ACCEPTANCE stage until the FINAL ACCEPTANCE according to Article 3 and as required thereafter implementing the training programme objectives. The technical assistance services shall cover both technical and commercial operations especially cost control. The number and type of technical assistance services personnel will be agreed between CONTRACTOR and OWNER at the appropriate time. As far as possible the personnel providing the technical assistance services will be selected from the category of personnel who have been responsible for the actual start up and operation of the PLANT during PLANT PERFORMANCE TEST. The number and type of technical assistance services personnel will be agreed between CONTRACTOR and OWNER at the appropriate time.