ruletaker

noun1

1. •
   One who receives rules made by others and is obligated to follow them.

   • Our organization sets its own standards in various ways, but on the topic of backward compatibility of these cartridges, we are in the role of ruletaker rather than rulemaker.
   • Since Brexit, there is a balance to strike regarding Britain's voluntarily implementing EU standards: most Britons (both pro-Brexit and anti-Brexit) are willing to prevent senseless bureaucratic bottlenecks in trade, but Brexit-minded Britons are wary that Britain be careful not to allow itself to backslide into being too much the ruletaker.