What did the court decide in Javins v. First National Realty Corp.?
Answered for: DC-Cir
We now reverse and hold that a warranty of habitability, measured by the standards set out in the Housing Regulations for the District of Columbia, is implied by operation of law into leases of urban dwelling units covered by those Regulations and that breach of this warranty gives rise to the usual remedies for breach of contract.
The decision that established an implied warranty of habitability in urban residential leases and made the tenant's rent obligation dependent on the landlord's performance. The sentence above is the court in its own words.
This answer is true in DC-Cir and nowhere else on this site. Another jurisdiction is another answer, or an honest gap: see what has been read for DC-Cir.