cavelamb himself wrote:

So I'm reading the survey for one of the boats that I'm looking at.
It's a Catalina 36 = 1984 model

Moored in fresh water now, but has been in salt water.

Under Surveyer's Recommendations are a list of items that needed attention.

It's not a long list but there is one item (C rated) that I'm
kinda concerned about.

It says "All items aloft (spars, rigging, fittings, hardware, etc)
should be visually inspected for condition by a qualified/experienced
yacht rigger or equivelent".

Is this normal for a professional survey?

Yes but it is more of a disclaimer than anything.

When we had our boat surveyed before purchase, we got Peter Hartoff
who several people recommended as the best around here. He did
everything except the rigging. He did an in water survey first and
then had us haul the boat, and did the hull, and then he took the boat
out for a sea trial. We had told him what use we intended to make of
the boat, so his survey was based on that.

When the marina wanted proof of insurance several years later, and the
insurance company wanted a survey first, we got another guy, and he
used the previous survey to check that we'd done the A list things and
the B list things and basically looked to see that nothing else had
gone terribly long in the interval. He did the survey with the boat
in the water - we didn't haul it for him.

And, like everything else on the list it it maked off, "done".
But I don't yet know who the equivelent was.

Who marked it 'done'. The only way to find out is to ask. Although
they may not tell you.

So I'm a little curious here.

Do I need to hire a professional rigger to check the rigging in a
situation like this?

I mean, replacing all the standing rigging on any boat is not a trivial
matter.

Now I don't necessarily have to have new rigging on the boat I buy, but
if it needs to be replaced I need to know up front. And adjust the price
as appropriate...

I'm getting from your question that you didn't order this survey -
that it was a previous survey done by the current or previous owner
(??) IMHO for most major purchases you should not rely on a previous
survey, because you don't know what purpose the survey was done for -
was it for insurance like our second survey, or was it for a previous
sale that fell through, or what.

If this IS your own survey, then you need to ask the surveyor what was
'done'.