Constitutional amendments are made through reforms and mutations, understood the latter as an informal process of alteration of the Constitution, which involves the modification of the sense of the legal precept, although the constitutional text remains the same. Mutations' causes are parliamentary, administrative or political, and jurisdictional practice. This article proposes that the principle of non-intervention that has to be complied by the Executive when performs foreign policy, according to the section X of article 89 of the Mexican Constitution, has changed in its interpretation due, in large part, to political practice and this is a result of changes in internal level and international order. The article intends to demonstrate that it is facing a constitutional mutation.
