The appellant sought compensation from the Foreign Claims Commission for assets nationalized by Czechoslovakia.
The Commission and the Federal Court of Appeal denied her claim, finding her dominant nationality was Czechoslovakian, not Canadian, at the time of expropriation.
The Supreme Court of Canada allowed the appeal, holding that the Regulations defining 'Canadian citizen' were unambiguous and did not exclude dual citizens.
The Court applied the plain meaning rule, concluding that extraneous materials, such as international agreements or negotiators' reports, could not be used to interpret the clear terms of the domestic Regulations.