https://www.lawfareblog.com/russia-north-korea-iran-comprehensive-sanctions-bill-currently-trumps-desk
"...Russia
The centerpiece of the legislation—and the portion that has rightly generated the most media attention—is the congressional review provision, which has been dubbed the Russia Sanctions Review Act of 2017. This provision essentially prohibits President Trump from lifting any existing sanctions against Russia without first explaining to Congress in a report what he has gotten, or will get, from the Russians by way of concession. The legislation requires the administration to send the report to the appropriate congressional committee, at which point the clock begins to tick. Congress then has thirty days to hold any hearings and consider a resolution of approval or disapproval under expedited procedures. (The exact procedures were one source of debate throughout this process and are discussed in more detail here.)
The provision is drafted quite broadly to cover actions that have any ameliorative effect despite falling short of formally lifting sanctions. For example, congressional review is required for a waiver, “a licensing action that significantly alters United States’ foreign policy with regard to the Russian Federation,” and any action which would allow Russia to regain access to properties in Maryland and New York.
A number of stakeholders have levelled a variety of constitutional arguments against the review provision, First, there are those—including the White House—who argue that it impinges on the President’s inherent Article II powers. As the Washington Post reported in June:..."