44．除承包人違約外，如因額外工程或工程量的增加或由此而涉及的任何延誤原因、或特別惡劣的氣候、或其他可能發生的任何特殊情況而使得承包人有權要求工程延期，工程師應決定延期時間，並由此通知業主和承包人。如承包人在此種工程開工後、或此種情況一發生、或按實情在其發生後的xx天內，沒有向工程師代表提交詳細說明他認為有權延期的報告而讓此陳述當時便得到調查，工程師可不予考慮額外工程或工程量的增加或其他特殊情況。
45．subject to any provision to the contrary contained in the contract，none of the permanent works shall，save as hereinafter provided，be carried on during the night or on sundays，if locally recognized as days of rest，or their locally recognized equivalent without the permission in writing of the engineer's representative，except when the work is unavoidable or absolutely necessary for the saving of life or property or for the safety of the works，in which case the contractor shall immediately advise the engineer's representative．provided always that the provisions of this clause shall not be applicable in the case of any work which it is customary to carry out by rotary or double shifts．
45．除契約另有相反規定外，未經工程師代表的書面允許，任何永久性工程不得在夜間或星期天進行，只要這些時間在當地被認作是假日，同時也不得在其他被當地認作是假日的時間進行，但下列情況除外：因工程而不得已或為挽救生命、財產或維護工程安全而絕對必要，在這種情況下，承包商應立即通知工程師代表。本條的規定不適用於按傳統需輪班或倒班進行的工作。
46．if for any reason，which does not entitle the contractor to an extension of time，the rate of progress of the works or any section is at any time，in the opinion of the engineer，too slow to ensure completion by the prescribed time or extended time for completion，the engineer shall so notify the contractor in writing and the contractor shall thereupon take such steps as are necessary and the engineer may approve to expedite progress so as to complete the works or such section by the prescribed time or extended time．the contractor shall not be entitled to any additional payment for taking such steps．if，as a result of any notice given by the engineer under this clause，the contractor shall seek the engineer's permission to do any work at night or on sundays，if locally recognized as days of rest，or their locally recognized as days of rest，or their locally recognized equivalent，such permission shall not be unreasonably refused．
46．不論是何原因使得工程或其任何部分的進度讓工程師覺得太慢，因而無法確保在規定或延長期限內完工，只要該原因不至於讓承包人有權要求延期，工程師必須書面通知承包人，接到通知後承包人應採取必要的措施，工程師可同意加快進度，以便能在規定或延長期限內完工或完成某部分工程。承包人無權因採取此種措施而要求額外付款。如因工程師按本條款所作的通知的緣故，承包人需要求工程師準許在夜間或星期日，如果其在當地被當做假日，或在其他被當地當做是假日的時間工作，工程師不得無故不準許。