sentences:  In 1998, aside from adding chapter eight (fundamental human rights) to the constitution, official status was secured to the Latvian language, the requirement for a referendum to change articles 4 and 77 was made, and article 82 was fully changed; it now defines types of courts in Latvia.In 2002, requirement for members of Saeima to give a solemn promise to acquire their mandate was added.Official status for the Latvian language was further secured by making it the working language of state and municipal structures.