"Validating a Mindanao-wide coverage is indeed convenient for the Court but it is not right. If, to use the words of the ponencia, the most important objective of Article VII, Section 18 is to 'curtail the extent of the power of the President,' then this Court miserably failed," Sereno said in her opinion which sought to limit the scope of martial law to Lanao del Sur, Maguindanao, and Sulu.