What are the tests in determining the nationality of corporations?

1. Incorporation test – Determined by the state of incorporation, regardless of the nationality of the stockholders.

2. Domiciliary test – Determined by the principal place of business of the corporation.

3. Control test – Determined by the nationality of the controlling stockholders or members. This test is applied in times of war.

4. Grandfather rule – Nationality is attributed to the percentage of equity in the corporation used in nationalized or partly nationalized area.