Related Rule
Ecuador
Practice Relating to Rule 67. Inviolability of Parlementaires
Ecuador’s Naval Manual (1989) states: “Enemy forces displaying a white flag should be permitted an opportunity … to communicate a request for cease-fire or negotiation.” 
Ecuador, Aspectos Importantes del Derecho Internacional Marítimo que Deben Tener Presente los Comandantes de los Buques, Academia de Guerra Naval, 1989, § 11.10.4.
It also states: “The following acts constitute war crimes: … firing on flags of truce.” 
Ecuador, Aspectos Importantes del Derecho Internacional Marítimo que Deben Tener Presente los Comandantes de los Buques, Academia de Guerra Naval, 1989, § 6.2.5(11); see also § 8.2.3 (protection of cartel ships).
Ecuador’s National Civil Police Penal Code (1960) punishes any member of the National Civil Police “who attacks parlementaires or seriously offends parlementaires”. 
Ecuador, National Civil Police Penal Code, 1960, Article 117(7).