In 1971, it was changed so the ribbon bearing the years 681, the year of the establishment of the First Bulgarian Empire by Asparukh and 1944. After the fall of Communism in 1990, the then-enforced Zhivkov Constitution was amended so the flag could be reverted to the pre-Communist era. The new Constitution of Bulgaria, adopted in 1991, describes the Bulgarian flag as follows:  A popular version of the flag, which has no official status, is also commonly known. It has the full coat of arms on the left of the flag, placed across the white and green fields only. According to the Law for the State Seal and National Flag of the Republic of Bulgaria, promulgated on 24 April 1998:  According to the Standardisation and Metrology Committee, the following are the required colours for use in the national flag: These flags derive from illuminated manuscripts dating from centuries after the end of the First Bulgarian Empire, and are ahistorical.