9239.0-8—Measure of damage.
The rule of damages to be applied in cases of timber or other vegetative resources, coal, oil, and other trespass in accordance with the decision of the Supreme Court of the United States in the case of Mason et al. v. United States (260 U.S. 545, 67 L. ed. 396), will be the measure of damages prescribed by the laws of the State in which the trespass is committed, unless by Federal law a different rule is prescribed or authorized.