Oacas is committed to making reasonable efforts to comply with the requirements of the accessibility standards for customer service set out under the accessibility for ontarians with disabilities act 2005 aoda. The organization of american states oas is the world s oldest regional organization dating back to the first international conference of american states held in washington d c from october 1889 to april 1890. Although agencies across the province have modified their business practices to respond to health and safety concerns their core protection services continue.