SECTION 2. Seat of Legislative Power.—The legislative power shall be vested in the Congress of the Philippines which shall consist of a Senate and a House of Representatives, except to the extent reserved to the people by the Constitutional provision on initiative and referendum.
SECTION 3. Inhibitions Against Members of Congress.—(1) No Senator or Member of the House of Representatives may hold any other office or employment in the Government, or any subdivision, agency, or instrumentality thereof, including government-owned or controlled corporations or their subsidiaries, during his term without forfeiting his seat. Neither shall he be appointed to any office which may have been created or the emoluments thereof increased during the term for which he was elected.
(2) No Senator or Member of the House of Representatives may personally appear as counsel before any court of justice or before the Electoral Tribunals, or quasi-judicial and other administrative bodies. Neither shall he, directly or indirectly, be interested financially in any contract with, or in any franchise or special privilege granted by the Government, or any subdivision, agency or instrumentality thereof including any government-owned or controlled corporation, or its subsidiary, during his term of office. He shall not intervene in any matter before any office of the Government for his pecuniary benefit or where he may be called upon to act on account of his office.
SECTION 4. Electoral Tribunal.—The Senate and the House of Representatives shall each have an Electoral Tribunal which shall be the sole judge of all contests relating to the election, returns, and qualifications of their respective Members. Each Electoral Tribunal shall be composed of nine (9) Members, three (3) of whom shall be Justices of the Supreme Court to be designated by the Chief Justice, and the remaining six (6) shall be Members of the Senate or the House of Representatives, as the case may be, who shall be chosen on the basis of proportional representation from the political parties and the parties or organizations registered under the party-list system represented therein. The senior Justice in the Electoral Tribunal shall be its Chairman.
SECTION 5. Commission on Appointments.—There shall be a Commission on Appointments consisting of the President of the Senate, as ex officio Chairman, and twelve (12) Senators and twelve (12) Members of the House of Representatives, elected by each House on the basis of proportional representation from the political parties and parties or organizations registered under the party-list system represented therein. The Chairman of the Commission shall not vote, except in case of a tie. The Commission shall act on all appointments submitted to it within thirty (30) session days of the Congress from their submission. The Commission shall rule by a majority vote of all its members.
SECTION 6. Legislative Investigation.—The Senate or the House of Representatives or any of its respective committees may conduct inquiries in aid of legislation in accordance with its duly published rules of procedure. The rights of persons appearing in or affected by such inquiries shall be respected.
SECTION 7. Appearance of Heads of Departments.—The heads of departments may upon their own initiative, with the consent of the President, or upon the request of either House, as the rules of each House shall provide, appear before and be heard by such House on any matter pertaining to their departments. Written questions shall be submitted to the President of the Senate or the Speaker of the House of Representatives at least three (3) days before their scheduled appearance. Interpellations shall not be limited to written questions, but may cover matters related thereto. When the security of the State or the public interest so requires and the President so states in writing, the appearance shall be conducted in executive session.
SECTION 8. Initiative and Referendum.—The Congress shall, as early as possible, provide for a system of initiative and referendum and the exceptions therefrom, whereby the people can directly propose and enact laws or approve or reject any act or law or part thereof passed by the Congress or local legislative body after the registration of a petition therefor signed by at least ten (10) per centum of the total number of registered voters, of which every legislative district must be represented by at least three (3) per centum of the registered voters thereof.
SECTION 9. Power to Propose Constitutional Amendments.—(1) Any amendment to, or revision of the Constitution may be proposed by: (a) the Congress, upon a vote of three-fourths (3/4) of all its Members; or (b) a constitutional convention. The Congress may, by a vote of two-thirds (2/3) of all its Members, call a constitutional convention, or by a majority vote of all its Members, submit to the electorate the question of calling such a convention.
(2) Amendments to the Constitution may likewise be directly proposed by the people through initiative upon a petition of at least twelve (12) per centum of the total number of registered voters, of which every legislative district must be represented by at least three (3) per centum of the registered voters therein. No amendments under this paragraph shall be authorized within five years following the ratification of the 1987 Constitution nor oftener than once every five years thereafter. The Congress shall provide for the implementation of the exercise of this right.
SECTION 10. Validity of Constitutional Amendments.—(1) Any amendment to or revision of the Constitution proposed by Congress or a constitutional convention shall be valid when ratified by a majority of the votes cast in a plebiscite which shall be held not earlier than sixty days (60) nor later than ninety days (90) after the approval of such amendment or revision.
(2) Any amendment to or revision of the Constitution directly proposed by the people through initiative shall be valid when ratified by a majority of the votes cast in a plebiscite which shall be held not earlier than sixty days (60) nor later than ninety days (90) after the certification by the Commission on Elections of the sufficiency of the petition.