The problematic portion for drone hobbyists is "S.2836 - Preventing Emerging Threats Act of 2018" that was attached to the FAA Reauthorization bill. https://www.congress.gov/bill/115th-congress/senate-bill/283...
In it's current form, it has some really vague wording and definitions. For example, the bill frequently refers to "threat" without a solid definition. It basically says that "threat" will be defined by the Secretary or Attorney General at a later time.