A party intending to raise an issue of foreign law must provide the court and all parties with reasonable written notice. Issues of foreign law are questions of law, but in deciding such issues a court may consider any relevant material or source-including testimony-without regard to the law of evidence.
Sup. Ct. R. D.C. 26.1
COMMENT TO 2016 AMENDMENTS
This rule has been redrafted to conform to the general restyling of the federal rules in 2002. It is identical to the federal rule except that it refers to the law of evidence rather than to the Federal Rules of Evidence.