商务合同句子练习E-C 1) Upon successful completion of the tests the Purchaser shall sign a Plant Acceptance Certificate evidencing such completion and listing any agreed Deficiencies to be corrected by CAE within such period as may be agreed with the Purchaser. 2) The Purchaser shall be able at all times to account for all copies of the Proprietary Software which are required to be made to permit its efficient use in its intended function.