It does. However, although one relates to 'what one does', whilst the other relates to 'what one ends up with', I think that, in practice, the difference is pretty subtle and that, if anything, what the law requires is probably less onerous than requiring that the installation be "reasonably safe" ... one could theoretically 'make provision for safety' which appeared very 'reasonable' and yet, for whatever reason, end up with an installation which was not necessarily 'reasonably safe' (at least, not in everyone's eyes).The law does not require the installation to be 'reasonably safe', it requires the installer to make reasonable provision for safety.
However, if anything this makes it even more difficult to know how a court would rule (i.e. whether a particular piece of work was 'illegal' or not). As above, a court might be satisfied that someone had "made reasonable provision for safety", even though some might argue that the resulting installation was not 'reasonably safe'.
Kind Regards, John