Pg. 33

If you read the sequence from point 2 to point 3, it prohibits using paid abilities or rezzing before the Runner encounters ice, provided the ice is already rezzed (but allows it for unrezzed ice).

Oversight or change?

 That has got to be an oversight. One of the key principles of upgrades that modify ice is the ability to wait until the runner is encountering the ice before rezzing them.

Point 3 does show that you can use paid abilities on rezzed ice, but not rezzing of other cards- this looks to be an oversight as it knocks the wind out of upgrades like Corporate Troubleshooter and Experimental Data.

Given the "only time the approached ice can be rezzed" line in point 2, I think the omission of the rez entry might have been for clarification that rezzing ice is a one time cost.

 Has been this question solved? Can I rez cards, when the runner is approaching rezzed ice?

Yes. You can.  For example - runner approaches a rezzed piece of ice.  You can rez corporate troubleshooter.

Paul Grogan said:

Side questions, when the runner approaches a piece of ice in one of your remote servers, can you rez other non-ice cards (like upgrades or assets) in other servers? Or only in the server the runner is running on?

Butaman551 said:

Yes, you can rez in other servers. I used Account Siphon on my first turn (running on HQ to steal money). As a response the corp rezzed SanSan City Grid in a remote server, leaving me with very little money taken :(

 Thanks a lot. Now if only my copy of the game would finally arrive…..

Paul Grogan said:

Where are you getting this ruling from?

Butaman551 said:

This is possible; any time the little [rez] symbol appears in the timing structure diagrams, cards can be rezzed. This includes cards not currently in the server being run on. The only restriction to rezzing is ice. Ice can only be rezzed in step 2.1 of the run timing structure (p. 33 of rulebook), and only if it is the specific ice being approached.

hollis said:

Pretty sure Lukas answered it somewhere, either here on on BGG

Paul Grogan said:

A link for reference would be awesome!

http://www.boardgamegeek.com/thread/843527/corps-turn-rezzing-cards-after-initial-draw/page/3

Paul Grogan said:

So it seems that some people have put forth arguments why it makes sense that you should be able to Rez upgrades/assets when approaching rezzed ice, but we still don't have an official clarification from FFG.

Indeed.  There is no official answer.   But I am 99% sure that you can.   Having a rezzed piece of ice on R&D and a Corporate Troubleshooter installed in the root, then not being able to rez the upgrade and use it when the runner approaches the ice is just not right.

But until the FAQ, you may choose to play however you wish.

I also just found this from Lukas:

"You should be able to rez cards approaching any piece of ice; I'm looking into this one in more detail and I would expect an official ruling whenever we release the first FAQ"