I dont believe that is true about the 3 yr rule before being intiated into OES

I have been a job's daughter since i was 11 and i initated inot OES at 18.....I am a Past bethel Guardian for Job's and i am up on all the policies and procedures and i never heard of a 3 yr rule.
i know a girl who joined jobs at 18 and joined OES the same yr with her mom