H. J. RES. 20 is a joint resolution allowing Congress to disapprove a specific rule from the Department of Energy. This rule involves energy conservation standards for consumer gas-fired instantaneous water heaters, which was published in the Federal Register on December 26,...
Simple Explanation
H. J. RES. 20 is like asking to cancel a new rule about saving power with certain water heaters. If Congress agrees, the rule will go away, and the water heaters won't have to follow the new power-saving ideas.