[Редна Ли]

Вот нашел такие фразы:

In the aftermath of the First World War two serious attempts were made to draft a convention dedicated solely to the protection of cultural property. The first attempt resulted in the adoption of the Roerich Pact in 1935 which is still binding on 11 states in the Americas.

We think that at present we must face the Pact once more because a number of international legal documents in the sphere of culture do not work. Meanwhile the Rerikh Pact proves to be quite simple from legal point of view and it is still in valid because it was never denounced.

Так что похоже что Пакт действительно до сих пор официально действует в 11 государствах Америки.