courtesy runner situation

[Andy]

Here in Phoenix, we are hosting the 18a Western National this weekend. During our umpires meeting earlier this week, our metro UIC proposed this situation:

Team A using DP/DEFO with the DEFO being the pitcher. DP bats and reaches first base safely. Coach A requests that the DEFO replace the DP on first base. Legal substitution, no problem. Coach A then states that he wants to use a courtesy runner for his pitcher who is now on first base. Do you allow this?

Evidently, an official interpretation has been issued on this situation by Merle Butler and Henry Pollard on the ASA NUS.

I'd like to hear what you all think about this.

Mike - please don't comment if you have received the official interpretation. Thanks.