Social Security officials gave examples of how the new rules would affect various children.
The new rules also affect the level of talent available, especially this year.
The rules only affect products collected after May 25, 2005.
It is also not clear how the new rules will affect the disabled.
Stern said such a rule might affect 1 out of 100 potential players in the league.
But that rule would not affect projects already in progress.
The rules for food vendors will also affect street artists.
The rules affect more than 20,000 companies employing 23 million workers at 70,000 sites.
But the rules will not affect timing of its release, officials said.
The general or special rules cannot affect this question, though they may apply when it is determined.