What seems to happen is that the GB keeps tabs on youngish men claiming to be anointed and if they deem them to be suitable (ie unquestionably society men and preferably not nutcases) invite them to the NY Bethel to serve on one of the committees along with the nethinim class as "helpers". Assuming they keep their noses clean & suck up to the GB they may eventually get the call. The pattern is clear from the last 2 appointees , one of whom was a CO in Australia & the other a CO in the USA. The GB are drawn from a small pool of candidates - Morris was a "wordly" person until he got the truth after coming back from military service in Vietnam and even had a family , which is very unusual for a GB member.
w063/15p.26 New Members of the Governing Body
ON Wednesday morning, August 24, 2005, the United States and Canada Bethel families, connected by video, heard an exciting announcement. Effective September 1, 2005, two new members—Geoffrey W. Jackson and Anthony Morris III—would be added to the Governing Body of Jehovah’s Witnesses.
Brother Jackson started pioneering in February 1971 in Tasmania, the island state of Australia. In June 1974, he married Jeanette (Jenny). Shortly thereafter, they were appointed to serve as special pioneers. From 1979 to 2003, they served as missionaries in Tuvalu, Samoa, and Fiji—island nations in the South Pacific. While in the islands, Brother and Sister Jackson also contributed much to the work of translating Bible literature. Beginning in 1992, Brother Jackson served on the Branch Committee in Samoa, and from 1996, on the Branch Committee in Fiji. In April 2003, he and Jenny became part of the United States Bethel family and began to work in the Translation Services Department. Soon thereafter, Brother Jackson was made a helper to the Teaching Committee of the Governing Body.
Brother Morris entered the pioneer service in 1971 in the United States. In December of that year, he married Susan, and they continued pioneering for nearly four years until the birth of their first son, Jesse. In time, they had another son, Paul. Brother Morris reentered the full-time service in 1979 as a regular pioneer. His wife joined him when the boys entered school. The family served where the need was great in Rhode Island and North Carolina, in the United States. In North Carolina, Brother Morris served as a substitute circuit overseer, and the boys took up regular pioneer service. Jesse and Paul were invited to the United States branch at the age of 19. Meanwhile, Brother Morris began circuit work. Then, in 2002 he and Susan were invited to Bethel, starting their new assignment on August 1. Brother Morris worked in the Service Department at Patterson and later as a helper to the Service Committee of the Governing Body.