Presumption of constitutionality of laws

"xxx.

The established rule is that every law has in its favor the presumption of constitutionality, and to justify its nullification there must be a clear and unequivocal breach of the Constitution, not a doubtful and argumentative one. 20 The burden of proving the invalidity of the law lies with those who challenge it. That burden, we regret to say, was not convincingly discharged in the present case.

Xxx. "


G.R. No. 128096 January 20, 1999
PANFILO M. LACSON, petitioner,
vs.
THE EXECUTIVE SECRETARY, THE SANDIGANBAYAN, OFFICE OF THE SPECIAL PROSECUTOR, THE DEPARTMENT OF JUSTICE, MYRNA ABALORA, NENITA ALAP-AP, IMELDA PANCHO MONTERO, and THE PEOPLE OF THE PHILIPPINES, respondent.
ROMEO M. ACOP AND FRANCISCO G. ZUBIA, JR., petitioner-intervenors.