It's not hard. Here is what is needed. The current rule

5.6.2.3 The CD may declare additional airspace to be closed.

All that is needed is one more sentence.

5.6.2.3 The CD may declare additional airspace to be closed, and may specify penalties for such airspace. The provisions of this rule can be used to set minimum MSL altitudes in some or all of the task area, and to score pilots as landing out if they descent below such altitudes.

Period. That is all that is needed.

As for the scoring program, it works just like restricted airspace now. Put in an SUA file, the scoring program says "warning, entry to restricted airspace" and the scorer can ether put in a penalty, or in the "edit flight log" box enter the current position as the scored landing position.

One may dislike the rule, but it is not complex to write or to administer.

John Cochrane