La Isabela and Estero Hondo became municipal districts in 1998; Belloso, Cabarete and Sabaneta de Yásica in 2002; La Jaiba in 2003; Yásica Arriba in 2005; Maimón, Río Grande and Estrecho de Luperón - Omar Bross in 2006; and Gualete in 2007.