In the rule Closed Requests, at the end of the second paragraph add the following

If the Brick Master believes a response to a closed request does not properly satisfy the requirements of the request, he may make a comment listening the offending mini-figures name and a AGAINST mark. He must then subtract the offending standard reward from the mini-figures fund. (A mini-figure’s funds are allowed to go negative by this process) and return the construction to the mini-figures workbench. The Brick master may do this at any time a request is active as well as within 48 hours of the request ceasing to be active. A mini figure who has their submission rejected in this manner may attempt to submit another construction for the request (provided it is still active).