The Zoning Regulation Rewrite (ZRR) represents a massive overhaul to DC's zoning code -- the rules that determine how DC develops (height, density, types of development around the city).
See this link: http://dcoz.dc.gov/ZRR/zrrcomment_module.shtm
DC has had zoning rules in place since 1958. As a compendium, these rules have been amended hundreds of times as needed to address deficiencies in development planning policies. There are decades of caselaw that supports these current rules.
Over the recent years, the DC Office of Planning has sought to rework all of these rules in an effort they claim to reformat and make it easier to use for the public. The ZRR is 1,000 pages long (the current rules are only 750 pages long).
At the end of May 2015, the public was made aware of the final language of these rule changes, as published in english-only in the DC Register.
See this link: http://dcoz.dc.gov/ZRR/ZRR.shtm
Additional "final" edits were made by the Zoning Commission at meetings in September and November 2015. Further, at these last meetings, the Zoning Commission denied any more extensions of time for folks seeking to be included in the deliberations.
The ZRR will affect all residents and every neighborhood for the next several generations.