In many regions it is becoming the practice for vassals and feudatories to renounce and resign verbally and without due notice the fiefs and benefices which they hold of their lords, and then to declare themselves free from their allegiance and to seize the fiefs under pretext of war. Therefore we decree hereby that such renunciation shall not be valid unless it is genuine and made with the condition that the fiefs and benefices shall revert immediately to the lords from whom they are held; those who have renounced their allegiance shall never disturb or molest their lords in the possession of these fiefs. Any subject violating this decree shall lose his fiefs and benefices, shall be branded with infamy, and placed under the imperial ban; no one shall ever give him a fief or a benefice, and any grant or investiture made to him shall be void. CHAPTER XV. CONSPIRACIES. We reprobate, condemn, and declare void all detestable and illegal conspiracies, confederations, and societies, which are or shall be made by cities or by persons of any rank or station, under color of any pretext whatever, inside or outside of cities, between city and city, person and person, or city and person, without the consent of the lords of the persons or territories; for it is well known that such conspiracies are declared illegal and void by the laws of our predecessors, the august emperors. We except from this condemnation such confederations and leagues as are entered into by princes, cities, and others for the preservation of the peace of their lands; these shall remain in force until we have decreed otherwise. If any person shall violate this decree and the ancient laws against conspiracies, besides incurring the regular penalties he shall be branded with infamy and shall be fined ten pounds of gold; cities and corporations guilty of a similar crime shall be fined 100 pounds of gold, half of which shall go to the imperial treasury, and half to the lord of the district, and they shall be deprived of the liberties and privileges which they have received from the empire. CHAPTER XVI. PFAHLBURGHERS.