Before pouring concrete or other the structural work necessary or system engineering.
The Contractor shall notify in advance to the taskmaster for less than 24 hours to verify accuracy prior to operation. When informed the pouring concrete or other work mentioned above.
If the taskmaster didn’t show up on the appointment schedule, the contractor can perform concrete working.
And if the taskmaster disapproved of pouring concrete, the Contractor would extend the period of construction according to the days of the delay after notify.