How did President Marcos rule by decree?

As a follower of Philippine history, politics and culture I am interested in recent affairs and how these things take place and take shape. I was puzzled on how former President Ferdinand E. Marcos was able to rule by decree.

I got my answer tonight while I was watching Crossroads, a national talk show on the ABS-CBN News Channel on SkyCable. The topic was about “Options to Resolve the Current Political Storm.” One of the guests was Governor Douglas Cagas of Davao del Sur and a former member of parliament of the old Batasang Pambansa. The Batasan was the unicameral parliament created by the 1973 Constitution.

Governor Cagas said that during times that the Batasan did not follow President Marcos’ will the President can invoke Amendment Number 6.

Amendment Number 6 of the 1973 Constitution:

Whenever in the judgment of the President (Prime Minister), there exists a grave emergency or a threat or imminence thereof, or whenever the interim Batasang Pambansa or the regular National Assembly fails or is unable to act adequately on any matter for any reason that in his judgment requires immediate action, he may, in order to meet the exigency, issue the necessary decrees, orders, or letters of instructions, which shall form part of the law of the land. (Source: Chan Robles Law Library)

President Marcos was very cunning.