THE SENATE OF THE PHILIPPINES, REPRESENTED BY SENATE PRESIDENT VICENTE C. SOTTO III, SENATE PRESIDENT PRO TEMPORE RALPH G. RECTO, SENATE MAJORITY FLOOR LEADER JUAN MIGUEL F. ZUBIRI, SENATE MINORITY FLOOR LEADER FRANKLIN M. DRILON, AND SENATE COMMITTEE ON ACCOUNTABILITY OF PUBLIC OFFICERS AND INVESTIGATIONS CHAIRPERSON RICHARD J. GORDON, AND IN THEIR OFFICIAL AND INDIVIDUAL CAPACITIES AS MEMBERS OF THE SENATE OF THE PHILIPPINES, PETITIONERS, VS. THE EXECUTIVE SECRETARY SALVADOR C. MEDIALDEA AND SECRETARY OF HEALTH FRANCISCO T. DUQUE III, RESPONDENTS