Manila, May 11 -- The House of Representatives on Monday imposed strict rules banning disruptions, demonstrations and unparliamentary conduct as lawmakers opened plenary proceedings on the Articles of Impeachment against Vice President Sara Duterte in what could become one of the most consequential constitutional exercises in recent political history.

Presiding officer Senior Deputy Speaker Ferdinand Hernandez of South Cotabato opened the session with a stern reminder that the proceedings were being conducted under the House's constitutional mandate and in accordance with due process.

"The presiding officer reminds everyone present that these proceedings are being conducted pursuant to the solemn constitutional mandate and duty vested u...