The Owner shall give the Supplier right of access to all parts of the Site within the time (or times) stated in the Contract to the extent required for the Supplier to commence work in accordance with the Program and to carry it out. The right and possession is not exclusive to the Supplier. If, under the Contract, the Owner is required to give (to the Supplier) possession of any foundation, structure, plant or means of access, the Owner shall do so in the time and manner stated in the Contract. However, the Owner may withhold any such right or possession until the Advance Payment Performance Security and the Performance Security under paragraph (b)(ii) of Sub-Clause 4.2 (Performance Security by Supplier and Letter of Credit and Advance Payment) have been received.