[1] Once elected, the Speakers retain their party allegiances, which means that they remain as MPs and are allowed to take part in debates and voting.

All MPs picked to be Cabinet ministers lose their MP status, and other members from their party are called up to Parliament to fill the seats they vacate.

Generally, the largest parties choose the chamber's left, right or centre wings, with smaller blocks accommodating themselves wherever convenient.

Individual MPs will sometimes sit entirely outside their block or stand, and, since compulsory electronic registration was implemented, may even vote from any seat in the house.

To the speaker's right, also facing the chamber, is a section with 17 seats reserved for the Cabinet, any of whom may or may not be present at any time during a parliamentary session.

[3] Located in the former Bulgarian Communist Party headquarters building in the Largo, The Chamber is made up of 270 seats arranged in a hemicycle of twelve rows, all facing the 7-seat speaker's bench.

In front of the Speaker, also facing the chamber, is the pulpit containing a stenographer's desk at the center and two sections reserved for the Cabinet, each with 13 seats, at the sides.

In addition to the ordinary National Assembly, a Grand National Assembly (Велико народно събрание, Veliko narodno sabranie) may be convened for matters of special jurisdiction, such as: 1) Adoption of a new Constitution; 2) Amendment of certain articles of the Constitution, e.g. those related with the basic civil rights; 3) Changes in the territory (gain or loss) of the Republic, etc.

Before the World War II the Grand National Assembly was also competent in electing the Regency of the Bulgarian Kingdom if the tzar had not come to age.

The 1991 Constitution was adopted by the Seventh Grand National Assembly and was composed of 200 members being elected by proportional representation and the other 200 under a first-past-the-post voting system.