The guidelines were these listed below, or something similar.
1° article - The faithful and discreet slave appeared only after 1919, so the understanding about 1914 was not a slave teaching.
2° article - The Bible Students prophecy about 1914was not fulfilled, in fact they expected that the end would come in October 1914, but this did not happen
3° article - Nebuchadnezzar's dream cannot be used to calculate 1914 , because it is not specified in the Scriptures. See explanation on how to use types and anti-types.
4° article - Does this mean that 1914 no longer matters ? No, the prophecies of Jesus began to be fulfilled from 1914 until today. Mattew 24