How long can eggs be stored before incubating?

[horselv2003]

How long can eggs be stored from lay time to being put in the incubator and is there any specific way to store them?

 

[retlaw]

Collect daily, store in cool place, rotate.
7 days with little problems, can go a bit more but then percentage starts to drop slowly.
I read everyday stored adds one hour to the hatch time.
So if you put one egg that was stored for 7 days with another laid that day in the incubator at the same time there would be a 7 hour difference in hatch time.

 

[horselv2003]

I have read that they have to be kept at 50-65 degrees and at 70 relative humidity. And that if they get over 65 degrees they will be no good. Is there any truth in this?