National Mediation Board
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National Assessment Agency ended in 2008.
National Assessment Agency was created in 2004.
National Environment Agency was created in 2002.
Each mediation is hired through the agency mediation department. rules and regulation of the agency sets the ethical practices for mediator: e.g: mediator does not make final decisions in negotiations, or whatever the mediator documents or hears from parties are supposed to stay confidential. Advocates such as lawyers have their own ethical practices: a Lawyer does not share his case with other lawyers to respect the confidentiality.
National Mediation Board was created in 1934.
If you are asking about the United States there is no national recovery agency, but FEMA. It is an federal emergency agency.
National Intelligence Agency - Nigeria - was created in 1986.
Norwegian National Collection Agency's population is 2,005.
National Agency for Computer Security was created in 2004.
Malaysian National Space Agency was created in 2002.