(1) "Dependent" means:

(a) Any natural child born or conceived before the period of time either of said child's parents served as a prisoner of war, was declared a person missing in action, served on state active duty or authorized training duty as a Colorado national guardsman, or was permanently disabled or killed while acting to preserve the public peace, health, and safety in the capacity of police officer, sheriff, or other law enforcement officer or firefighter;

(b) Any child lawfully adopted, or for which formal adoption procedures were commenced, prior to the time either of said child's adoptive parents served as a prisoner of war, was declared a person missing in action, served on state active duty or authorized training duty as a Colorado national guardsman, or was permanently disabled or killed while acting to preserve the public peace, health, and safety in the capacity of police officer, sheriff, or other law enforcement officer or firefighter; or

(c) Any child in the legal custody of or whose parent has parental responsibilities with respect to such child or for which proceedings for custody or the allocation of parental responsibilities were initiated by either of said child's parents prior to the time such parent served as a prisoner of war, was declared missing in action, served on state active duty or authorized training duty as a Colorado national guardsman, or was permanently disabled or killed while acting to preserve the public peace, health, and safety in the capacity of police officer, sheriff, or other law enforcement officer or firefighter.