squid - restrict max upload

Hi all. I want to restrict users from uploading large files, in my case I want to allow only 3 Mb for uploading.

I already restricted for max download with this option: reply_body_max_size 2000000 allow all <= max file size is 2 Mb

But I can't find the code to restrict upload ! Waiting for a reply

10x in advance

P.S.: My OS RH9 (reply in Russian too)