Power sector regulator Central Electricity Regulatory Commission can also take up the job of coal sector watchdog till a permanent body for the same is formed, a top official said on Thursday. "We have said that in the absence of a coal regulator, CERC can do the job ... As a 'stop-gap' arrangement," Power secretary Uma Shankar said. Power minister Sushilkumar Shinde, last month, had written to coal minister Sriprakash Jaiswal in this regard.