Installation will conform to the requirements of the regulations including cables concealed in walls.
What it means
Since cables are concealed the standard gives a number of measures in 522.6.6 which are designed to protect the user from inadvertently causing a fault.
A variety of solutions are shown for cables concealed in walls, if the cable is mechanically protected and within the zones stated residual current protection is not required. It may be required to meet another part of the standard though.