| September 14, 1988 | Philippines became a signatory to the Montreal Protocol |
| October 26, 1990 | RA 6969 |
| March 21, 1991 | Montreal Protocol concurred with by the Philippine Senate |
| July 17, 1991 | Philippine’s Instrument of Accession and Ratification was deposited to the UN Secretary - General |
| October 15, 1991 | Accession of Montreal Protocol was entered into force |
| March 10, 1993 | Senate ratified the London Amendments through Resolution No. 25 |
| May 1993 | The first Philippine Country Program for the phase-out of ODS was written |
| August 09, 1993 | Ratification instrument of the London Amendment was deposited with UN |
| November 07, 1993 | Accession of the London Amendments was entered into force |
| October 1999 | Updated Philippine Country Program of the Phaseout of ODS was completed |
| 2000 | Chemical Control Order for Ozone Depleting Substances was established |
| March 19, 2001 | The Philippine Senate ratified the Copenhagen Amendments |
| June 15, 2001 | Philippine’s Instrument of Accession and Ratification was deposited to UN Secretary-General |
| September 12, 2001 | entered into force |
| March 2006 | The Philippine Senate ratified the Beijing Amendments |