Region I - Ilocos, 1989-2019, peso
As RA 6727 effective July 1, 1989.
As per WO RB1-01 under RA 6727 effective November 18, 1990.
As per WO RB1-02 effective June 11, 1991.
As per WO RB1-03 effective December 24, 1993.
As per WO RB1-04 effective Feb ruary 22, 1996.
As per WO RB1-05 effective March 5, 1997.
As per WO RB1-05 effective June 1, 1997.
As per WO RB1-06 effective March 5, 1998.
As per WO RB1-06 effective July 1, 1998.
As per WO RB1-07 effective December 1, 1999.
As per WO RB1-08 effective December 15, 2000. COLA of P5 included.
As per WO RB1-09 effective November 11, 2004. COLA of P10 included.
As per WO RB1-10 effective July 7, 2005. COLA of P12 included.
As per WO RB1-11 effective August 9, 2006.
As per WO RB1-12 effective December 31, 2007.
As per WO RB1-13 effective June 22, 2008. COLA of P10 included.
per WO RB1-14 effective January 20, 2011.
As per WO RB1-15 effective July 25, 2012.
As per WO RB1-16 effective February 5, 2014.
As per WO RB1-17 effective July 19, 2015.
As per WO RB1-17 effective December 1, 2015.
As per WO RB1-18 effective October 2, 2016.
As per WO RB1-19 effective Jan 25, 2018.
As per WO RB1-20 effective Apr 30, 2019.
As per WO RB1-20 effective Oct 1, 2019.
