CHAPTER FOUR
The Executive Power
Part Three
Provisions Governing Both Houses
Article 86:
1- No member of the Senate and the House of Representatives shall be detained or tried during the currency of the sitting of the Parliament unless the House to which he belongs issues a decision by the absolute majority that there is sufficient reason for his detention or trial or unless he was arrested flagrant delicto. In the event of his arrest in this manner, the House should be notified immediately.
2- If a member is detained for any reason during the period the Parliament is not sitting, the Prime Minister shall notify the House to which that member belongs when it sits of the proceedings taken, coupled with the necessary explanation.
State privileges and immunities
Immunity - national proceedings
EDIT.