The installation of the equipment shall be supervised by DÜRR at Purchaser´s site, within the time given in the time schedule, Annex II. It is the Purchaser´s obligation to have the site ready for installation, by the date for start of installation, shown in the time schedule, i.e. availability of main supply of electric power, water, compressed air. (others to be specified, when required.) Such supplies shall be free of charge for DÜRR. DÜRR`s internal communication cost shall be on DÜRR`s account.