Jonas’s Rule number three states as follows:
“From this moment you are exempted from rules governing rudeness. You may ask any question of any citizen and you will receive answers.”
The phrasing of the rule is a bit disturbing, and it demonstrates the Jonas is becoming powerful. He is further set apart.
When Jonas learns that his father is planning to release one of the newborn identical twins, he becomes curious about release and asks The Giver about it. The Giver reminds him of the third rule, and his important position in the Community.
"Jonas, when you and I have finished our time together, you will be the new Receiver. You can read the books; you'll have the memories. You have access to everything. It's part of your training. If you want to watch a release, you have simply to ask."
The Giver decides that Jonas needs to find out what Release means. This is a turning point in the story, the point of no return. When Jonas finds out what Release means, he is in on the community’s dirty little secret.