多项选择题
The position of the SCL Protocol (the Delay and Disruption Protocol published by the United Kingdom Society of Construction Law) on valuation of variations is that (where practicable), the total likely effect of variations should be pre-agreed between the employer/contract administrator and the contractor:
A、to arrive, if possible, at a fixed price of a variation
B、to include not only the direct costs (labor, plant, and materials)
C、to include the time-related costs, an agreed extension of time and the necessary revisions to the program
D、to issue the Taking-over Certificate for the Works