1.17 The Contractor shall ensure that all persons employed in connection with the construction of the Works are suitably skilled and experienced in their several professions, trades and callings or adequately supervised.
1.18 The Contractor shall ensure that all aspects of the Works are supervised by sufficient numbers of persons who have adequate knowledge for the satisfactory and safe performance of the Works in accordance with the Contract and with regard to the activities which are carried out at the relevant Site(s) and to the nature of persons occupying the relevant Site(s).