As respects the press release from 1992 by the UN perhaps this needs repeating:
A representative of the WTS tried to get in some certain part of the UN library facilities one day. He was told he couldn't get in unless he had an NGO pass. So they filled out the application and submitted the required information. They were then issued an NGO pass to access all the library facilities. They never signed any document saying they would agree to support the UN or even share the ideals of the UN charter. They did supply articles which they had written about the UN which was the only requirement stipulated on the application.
Every so often they filled out a form which told who would receive the cards or passes to get in the extensive library facilities and what fields they were intererested in. They also periodically supplied articles they had written about the UN. This of course was nothing new as the WT has always published articles about what the UN is doing and how they will not solve the problems of mankind but rather it is only God's kingdom that can do that.
Meanwhile, the UN released a brochure and press release saying among other things that NGOs agreed to support the UN. Then in 2001/2002 the UN began a new review process that required NGOs to agree to do things that the WTS had never agreed to do. When the WTS found out about the new criteria that had to be agreed to and that the UN was saying that NGOs must support the UN they basically said, 'Wait a minute. We did not agree to support the UN or its charter nor do we agree to do that now. Please remove us from your list of NGOs.'
It is quite simple.