Simplify the following text for a Grade 5 native English-speaking person.
Original: The flag was designed by Silvio Carvalho Feitosa and adopted with complementary Law No. 41 of December 22 , 1981 .
Simplified: The flag was designed by Silvio Carvalho Feitosa . It was made the flag of the state on December 22 , 1981 .