I looked at the POST_MAX code. It simply checks the ENV(CONTENT_LENGTH} against the POST_MAX value and returns a 413 error if larger. The problem with that solution is that the CGI script has ALREADY been passed the unneeded large data block, so handling it at server level seems to be a better approach.

Based on your helpful pointer, I was able to get the host I use to add this directive to the allowed list. I have now added it at Directory level for my CGI folder and it works great to block undesired POST data over my specified size. THANKS much!