Règle correspondante
Practice Relating to Rule 138. The Elderly, Disabled and Infirm
The Rules for Combatants (1989) of the Philippines provides that all civilians, particularly the elderly, must be respected. 
Philippines, Rules for Combatants, in Handbook on Discipline, Annex C(II), General Headquarters, Armed Forces of the Philippines, Camp General Emilio Aguinaldo, Quezon City, 1989, Rule 1.
Article 2(24) of Part III of the 1998 Comprehensive Agreement on Respect for Human Rights and IHL in the Philippines provides:
This Agreement seeks … to protect and promote the full scope of human rights and fundamental freedoms, including: … the right of … the disabled to protection, care, and a home, especially against physical and mental abuse, prostitution, drugs, forced labour, homelessness, and other similar forms of oppression and exploitation. 
Comprehensive Agreement on Respect for Human Rights and International Humanitarian Law between the Government of the Republic of the Philippines and the National Democratic Front of the Philippines, The Hague, 16 March 1998, Part III, Article 2(24).