A constitutional referendum, in accordance with section 4 of article 177 of the Constitution, is conducted by a decision of two-thirds of all members of the Assembly that a proposed constitutional amendments be decided by direct popular vote. A constitutional referendum, in accordance with section 5 of article 177 of the Constitution, is one requested by one-fifth of the members of the Assembly to submit to popular vote a constitutional amendment approved by not less than two-thirds of all members of the Assembly.
