Some in Congress want to review rules that implement laws passed by Congress. They want a veto on actions of federal agencies doing their job to implement the laws passed by Congress. Including if Congress doesn’t vote on it, then the regulation dies.
Here’s a good summary from Science Friday. . . https://www.sciencefriday.com/segments/trump-versus-the-epa/ When you go to the page, scroll down for a summary if you don’t have 30 minutes for the Science Friday segment.
An except, with the citations to the proposed laws:
The proposed Regulations From the Executive in Need of Scrutiny (or REINS) Act would require the House and Senate to vote on any new regulation costing more than $100 million. (For perspective, the EPA rule reducing emissions from toxic mercury was $9.6 billion, with an expected annual public health benefit of $37–90 billion.) Any regulation not voted on within 70 days would be dropped. Furthermore, the Secret Science Reform Act would require that the EPA make decisions based only on information that is publicly available online for independent analysis, throwing into question whether any study that includes confidential personal health information could ever be considered by the agency.