Related Rule
Practice Relating to Rule 74. Chemical Weapons
The Philippines’ Republic Act No. 8438 (1997) provides: “It is the policy of the Cordillera Autonomous Region to prohibit the development, storage, use or transport of nuclear, biological or chemical weapons within the region.” 
Philippines, Republic Act No. 8438, 1997, Section 19.
At the CDDH, the Philippines proposed an amendment to include “the use of weapons prohibited by international Convention, namely: … asphyxiating, poisonous or other gases, and all analogous liquids, materials or devices” in the list of grave breaches in Article 74 of the draft Additional Protocol I (now Article 85). 
Philippines, Proposal of amendment to Article 74 of the draft Additional Protocol I submitted to the CDDH, Official Records, Vol. III, CDDH/418, 26 May 1977, p. 322.
The proposal was rejected because it failed to obtain the necessary two-thirds majority (41 votes in favour, 25 against and 25 abstentions). 
CDDH, Official Records, Vol. VI, CDDH/SR.44, 30 May 1977, pp. 288–289. (Against: Australia, Belarus, Belgium, Bulgaria, Canada, Czechoslovakia, Denmark, Finland, France, Federal Republic of Germany, German Democratic Republic, Hungary, India, Luxembourg, Monaco, Mongolia, Netherlands, New Zealand, Poland, Portugal, Ukraine, USSR, United Kingdom, United States and Zaire. Abstaining: Brazil, Cameroon, Cyprus, Cuba, Greece, Guatemala, Indonesia, the Islamic Republic of Iran, Ireland, Israel, Italy, Japan, Republic of Korea, Mauritania, Morocco, Nigeria, Norway, Romania, Spain, Swaziland, Sweden, Thailand, Turkey, Uganda and Viet Nam.)
In 1991, during a debate in the First Committee of the UN General Assembly, the Philippines stated that it neither possessed nor produced chemical weapons. 
Philippines, Statement before the First Committee of the UN General Assembly, UN Doc. A/C.1/46/PV.15, 24 October 1991, p. 24.
At the First Conference of States Parties to the Chemical Weapons Convention in 1997, Philippines emphasized the importance of the 1993 Chemical Weapons Convention and stated its commitment and its determination to contribute actively to the realization of the Convention’s aims. 
Philippines, Statement at the First Conference of States Parties to the Chemical Weapons Convention, The Hague, 6–23 May 1997.
The Report on the Practice of the Philippines states with reference to the prohibition of chemical weapons: “The Philippines is against the use, production, and stockpiling of … chemical weapons. In fact, it adheres to peaceful, non-military approaches to conflict and renounces the use of … chemical weapons.” 
Report on the Practice of Philippines, 1997, Answers to additional questions on Chapter 3, referring to Statement by the Department of Foreign Affairs, Office of United Nations and International Organizations (UNIO), Manila, 6 March 1998.