The forms and solemnities of contracts, wills, and other public instruments shall be governed by the laws of the country in which they are executed.
When the acts referred to are executed before the diplomatic or consular officials of the Republic of the Philippines in a foreign country, the solemnities established by Philippine laws shall be observed in their execution.
Prohibitive laws concerning persons, their acts or property, and those which have for their object public order, public policy and good customs shall not be rendered ineffective by laws or judgments promulgated, or by determinations or conventions agreed upon in a foreign country. (11a)