This is very interesting. Can you provide a source which confirms this? I am interested in learning more about it. What changed in the 90's and why?
The International Lesbian and Gay Association (ILGA) had achieved UN consultative status in the 90's but were suspended shortly afterwards due to NAMBLA's membership within the ILGA. Obviously, ILGA cut its links with NAMLBA because of it.
NAMBLA were founded by David Thorstad who had been a prominent gay rights campaigner. The group were helped by the fact that some gay magazines (such as The Body Politic), would publish pro-pederest material during this time.
PIE was a British pro-peadophillia activist group. Again, they were founded by a homosexual named Michael Hanson and were set up as a special interest group within an LGBT organisation called the Scottish Minorities Group.