Black Eggs (Weekend pics, part 3)

Owakudani is famous for black eggs that are cooked in the boiling hot sulfuric spring water here. But apparently they don't always have them available. At least, that's what I think they're saying here.
The sulfuric gases that fuel the tourist industry here are apparently not all that healthy for you. I decided I didn't have a dedicate bronchus and went on regardless!

The gases and spring water here might not be so good for you, but the eggs they cook in them are apparently very healthy for you.

And this one, I just can't work out. Ok, point 1 refers to the fact that you can only buy 6 eggs at a time, I understand that. And point 4 is obvious. And 2 might just mean that you have to eat the eggs within 2 days. But point 3 really gets me. Can anyone read the japanese and provide a better translation? Or anyone, any suggestions as to what it might mean? Prizes for the most creative responses...