User blog comment:KarasuGamma/The Future Pricing Scheme/@comment-8225465-20130415140320

Well, maybe I understood them wrong, but:

The oldest 6300IP champ will be lowered with every champion release.

Every 3 releases an additional champion will be lowered based on their age, price and difficulty.

That's how I understood that: they will lower 6300 only by age.