The figure mentioned simply tabulates a process that I would expect most fire risk assessors offering their services on a commercial basis to follow. You'd probably sensibly choose to adopt something along the lines shown whether you'd read PAS 79 or not. There are parts of the table that I wouldn't necessarily have put in myself, but that's just a matter or personal opinion (there's always more than one way of skinning a cat).
So... yes, if they're offering their services on a commercial basis, or are tasked as enforcing authorities under Article 26 of the FSO, I would expect them to have the capability to follow the table if they chose to use PAS 79 as the basis of their activities.
Just to be pendantic - a PAS is not a 'standard', not are they necessarily "nationally recognised". They can be considered for conversion into a standard, though, at the end of the initial review period (usually 2 years). Having said this, PAS 79 is well-used within our industry & (in my view) they ought to consider conversion in this case, as it would only help improve rigour and consistency if it achieved the enhanced status of a full British Standard.