[5][6] It was among those executive orders issued to create 33 municipalities, even their respective legislative bills did not pass Congress.

4989 was enacted without executive approval,[8][9] eventually recreating the municipality by separating 16 barrios, as originally proposed,[5] from its mother entity.

[11] Its territory was reduced in 1982 when the southern part was organized into a separate municipality, Godod, by virtue of Batas Pambansa Blg.

[9] Siayan was consistently the country's poorest municipality from 2003 to 2009,[14][19] with almost the entire population (97.5% in 2006 and 2009) living below the poverty threshold based on data from the National Statistical Coordination Board.

[citation needed] Poverty Incidence of Siayan Source: Philippine Statistics Authority[21][22][23][24][25][26][27][28]