Fred Franz argued for 1974 inside the GB, and he wanted to publish a revised chronology ... they were tired of his tinkering ... enough fallout from 1975 already, without adding more fuel to the fire.
slimboyfat ...
Yes, from what I can remember, they went into "damage control" in the early 1970's. The "just in case" thing came out, as I can remember, around 1972/1973 or so when the new "extension" of time in which you had to add the time that Eve was created to the original 6,000 years or something like that.