No it doesn't. What it technically means is that, if that switch is located between the meter and the CCU, then any cable between it and the CCU is not 'bound' by utility requirements.
Tails form a part of the consumer's installation, but must comply with the supplier's requirements. Where the protection is the supplier's cut-out this is obvious. However, where they are protected by an additional switch-fuse, rated the same as the cut-out, the same dimensions apply. The switch-fuse is deemed to be a matter of 'convenience' to isolate the whole installation, and not a "subsequent circuit".
It may be that an individual supplier may not be fussed, however most would be; a tail technically becomes a submain if it has a switch in it, but this is rather academic. It is worth being mindful that your tail - with or without the switchfuse ( rated 100A ) - must be able to withstand a fault current of 100A. You would not be permitted to use cable less than 16mm in any case.
