TITLE II
FUNDAMENTAL RIGHTS AND DUTIES
CHAPTER II
FUNDAMENTAL RIGHTS, FREEDOMS AND GUARANTEES
SECTION II
GUARANTEE OF FUNDAMENTAL RIGHTS AND FREEDOMS
Article 57
(Restriction of rights, freedoms and guarantees)
2. Laws restricting rights, freedoms and guarantees must be of a general and abstract nature and may not have a retroactive effect nor reduce the extent or scope of the essential content of constitutional precepts.
EDIT.