The Senate shall hold its ordinary sessions twice a year. Each session shall last at least three months. If there is a proposal from the king or the prime Minister, or at least one-third of the senate, the Senate standing Committee shall call an extraordinary session of the Senate.

The Senate sessions shall be held in public. The Senate shall meet in closed session at the request of the President or of at least one-tenths of its members, of the King or of the Prime Minister or the President of the Assembly. The Senate meeting shall be considered as valid provided there is a quorum of seven-tenths of all members. The numbers of votes which are required for the Assembly approval as provided for in the Constitution, shall be applied to the Senate as well.

The seating order of the Senate members shall be arranged party by party, except for the President, Vice Presidents, and members of the Permanent Committee.

The meeting of the Senate is valid only when: (1) The quorum of the session exceeds 2/3 of all senators for any adoption which requires two-third majority vote of all senate members.  (2) The quorum of the session exceeds ½ of all senators for any adoption which requires a relative majority vote, or absolute majority vote of all senate members.

An absolute majority vote of all senators is used in the following cases:

- Election of the President, Vice Presidents of the Senate and all members of the commissions or special commission;

- Adoption of organic law;

- Adoption of the Internal Regulations of the Senate;

- Adoption of laws or issues.

A two-third-majority vote of all senators shall be used for the following cases:

- Adoption of the Constitution law;

- The vote pertaining to decision to indict, arrest, detent, confinement disciplinary action, lifting of parliamentary immunity, incompatibility, loss of membership, or abandonment of post.

A three-fourth-majority vote of all senators shall be used to decide on suspension of detention or indictment of any senator.

The meeting of the Senate can not proceed unless there is presence of the leadership of the Senate. At any meeting, if the President and Vice President are not present due to any special circumstance, the Senate shall temporarily postpone the meeting.