In the case of [an] armed international conflict, formally declared or not, or of a grave internal commotion that puts in imminent danger the rule [imperio] of this Constitution or the regular functioning of the organs created by it, the Congress or the Executive Power may declare the State of Exception in all or in part of the national territory, for a term of sixty days maximum. In the case that such declaration is effected by the Executive Power, the measure must be approved or rejected by the Congress within a time period of forty-eight hours.
The decree or the law that declares the State of Exception will contain the reasons and the facts invoked for its adoption, the time of its enforcement and the territory affected, as well as the rights that it restricts.
During the enforcement of the State of Exception, the Executive Power may only order, by decree and in each case, the following measures: the detention of the persons indicted [indiciadas] for participating in some of those acts, their transfer from one point to another of the Republic, as well as the prohibition or the restriction of public meetings and of demonstrations.
In all the cases, the persons indicted [indiciadas] will have the option to leave the country.
The State of Exception will not interrupt the functioning of the powers of the State, the enforcement of this Constitution or, specifically, habeas corpus.
… (Art. 288)