When does Joel say the living world will need to call out to Jehovah God for salvation?
Joel indicates the living world will call out to Jehovah God for salvation when the King and the Kingdom have become a reality. At that time, salvation will operate under the Kingdom economy, not under grace as it does now. The wording is the same, but the circumstances are totally different.
Les explains that Joel's wording about calling out to Jehovah God is not the same circumstance as Paul's gospel of grace. At the time of Joel, Christ had not yet died, and the offer of salvation had not been turned over to the whole world; it was still confined to Israel under the Law. Joel foresees that once the King and the Kingdom become a reality, the living world will have to call out to Jehovah God and can experience salvation under the Kingdom economy. The words may match Paul's, but the settings are totally different: one is under grace, the other under the Kingdom economy.