The EPA extended registration of dicamba for an additional two years. The bullet points are the changes made to the federal label:

Two-year registration (until December 20, 2020)
Only certified applicators may apply dicamba over the top (those working under the supervision of a certified applicator may no longer make applications)
Prohibit over-the-tip application of dicamba on soybeans 45 days after planting
Applications will be allowed only 1 hour after sunrise to 2 before sunset
In counties where endangered species may exist, the downwind buffer will remain at 110 feet and there will be a new 57 foot buffer around other sides of the field (110 foot downwind buffer applies to all applications, not just in counties where endangered species may exist)
Clarify training period for 2019 and beyond, ensuring consistency across all products
Enhanced clean out instructions for the entire system
Enhanced label to improve applicator awareness on the impact of low pH’s on the potential volatility of dicamba
Label clean up and consistency to improve compliance and enforceability

State regulations have not been announced for the 2019 season.

Find this and more information can be found on EPA Announces Changes to Dicamba Registration

Dicamba Registration Decisions for 2019 – 2020 Seasons