Chapter one
FUNDAMENTAL PRINCIPLES
Art. 5
(4) Any international treaties which have been ratified by the constitutionally established procedure, promulgated and having come into force with respect to the Republic of Bulgaria, shall be considered part of the domestic legislation of the country. They shall supersede any domestic legislation stipulating otherwise.
(5) All legislative acts shall be promulgated and shall come into force three days after the date of their promulgation unless otherwise envisaged by the acts themselves.
Priority of Rome Statute over national law
EDIT.