A certification of  qualification from an internationally or nationally recognized Montessori organization   

This statement needs to be defined.  In order to be "recognized," Montessori credentials must come from MACTE accredited institutions.  MACTE is the Montessori Accreditation Council for Teacher Education and it accredits Montessori teacher education programs both nationally and internationally.  MACTE is a member of the Association of Specialized and Professional Accreditors and is recognized by the US Department of Education.