From page 265 of Crisis of Conscience by Raymond Victor Franz. AFAIK, this was alredax included in the first edition, so long before the change of 1995 and of course 2008:
The leadership had made numerous adjustments and now had few remaining options. There was the 1957 starting date for “this generation” proposed by members Schroeder, Klein and Suiter, but that seemed an unlikely choice. There was Albert Schroeder’s idea of applying the phrase to the ‘‘anointed’’ class (an idea that had been floating around the organization for many, many years) which offered certain advantages—there are always additional persons (some fairly young) who each year decide for the first time that they are of the “anointed” class. So this would offer an almost