It's my understanding that the old light regarding the faithful and discreet slave was that in 1918-1919 Jesus appointed the faithful and discreet slave over all his house.
But under the new light, it's a two-stage process.
Now the "truth" is that in 1919 Jesus appointed the Governing Body to provide spiritual food in due season and the GB will only be placed in authority over his domestics during the Great Tribulation.
All of this is WT nonsense, but in order to get JWs who believe this stuff to think about the implications, my questions are:
1. What will the future appointment authorize the Governing Body to do that is not yet authorized?
2. Since under the old light the Governing Body has wrongly believed they have had this authority since 1919, doesn't this mean they have been wrongly exercising authority that Jesus hasn't yet given them?
3. Since their current authority is only to provide spiritual food at the proper time, do they have the authority to appoint elders? To require field service? To require records to be kept of field service? To make rules not contained in the Bible itself, such as dress codes? To appoint judicial committees? To disfellowship people? To control who is in good standing in Jehovah's earthly kingdom and who is not? To make judgments about individual JWs' spirituality that impact whether or not they will survive Armageddon?
4. No Bible derivation has ever been given for the 1919 date. All we have is Rutherford's word for the fact that Jesus gave him authority in that year. Now the GB tells us that Rutherford was wrong about the extent of the authority that he was given and that Knorr and Franz were likewise in error. Isn't it a serious matter to claim that God has given you authority that in fact he has not given you? How did this happen? Weren't these men being guided by holy spirit? Why did Jehovah take 94 years (1919-2013) to reveal that they were wrongly claiming authority that had not yet been given?
5. Now that the GB realizes that it does not yet have the authority over Jesus' domestics that it thought it did, what rules or policies will it repeal?