If there is no Rule titled “Calvinball” this proposal does nothing.

Remove the last line of the Rule titled “Calvinball” and add the text:-

If the Calvinball is possessed by an Imaginary Friend who has no Best Friend, then the Ball is automatically Dropped.

If the Ball is Dropped then it becomes in the Possession of nobody.

Create a subrule to “Calvinball” with the title “Passing” and the text:-

If a Child possesses the Ball, or is Best Friends with an Imaginary Friend who possesses the Ball, then they may Throw the Ball by creating a Throw Post. A Throw Post is a Story Post with a title of the form “X passes to Y” where X is the name of the Child or Imaginary Friend who currently owns the Ball and Y is another Child or Imaginary Friend.

If it has been 24 hours since the Ball was Thrown, and if the Child who Threw the Ball possesses the Ball, or is Best Friends with the Imaginary Friend who possesses the Ball, then the Ball is either Passed, Intercepted, or Dropped, according to the following procedure.
-If there are no successful Interception Attempts and no successful Strip Attempts on the Throw Post, then the Ball is Passed to Y.
-If there is at least one successful Interception Attempt on the Throw Post, then the Ball is Intercepted by the Child or Imaginary Friend who is named in the first line of the oldest successful Interception Attempt
-If there is at least one successful Strip Attempt on the Throw Post, then the Ball is Dropped.

When the Ball is Passed to, or Intercepted by a Child or Imaginary Friend, they come into possession of the Ball.

Create a subrule to “Passing” with the title “Interference” and the text:-

Each Child may make either an Intercept Attempt or a Strip Attempt on a Throw Post.

An Intercept Attempt is a comment on a Throw Post that Begins with the word “Intercept” and then either the name of the Child making the Intercept Attempt, or the name of an Imaginary Friend that is Best Friends with that Child.
However, a comment is not an Intercept Attempt if the Child who posted it has already made an Intercept Attempt or a Strip Attempt on the Throw Post it is attached to.

A Strip Attempt is a comment on a Throw Post that Begins with the word “Strip”.
However, a comment is not a Strip Attempt if the Child who posted it has already made an Intercept Attempt or a Strip Attempt on the Throw Post it is attached to.

After making an Intercept or Strip Attempt, a child should roll DICE100 in the GNDT and make a comment in the same Throw Post stating whether or not their Attempt was successful, this is called Confirming the Attempt.
An Intercept Attempt is successful if the Child making it Confirms it and the GNDT result is greater than 85.
A Strip Attempt is successful if the Child making it Confirms it and the GNDT result is greater than 75.
Children may not roll on the GNDT more than once per Attempt.