Section 5. Before they enter on the execution of their office, the President, the Vice- President, or the Acting President shall take the following oath or affirmation:

"I do solemnly swear [or affirm] that I will faithfully and conscientiously fulfill my duties as President [or Vice-President or Acting President] of the Philippines, preserve and defend its Constitution, execute its laws, do justice to every man, and consecrate myself to the service of the Nation. So help me God." [In case of affirmation, last sentence will be omitted]