PSA Metropolitan Chapter (PSA-MET) was approved by PSA in 16 June 2015. PSA Chapter were organized under the Society's Bylaws in 1955. Each Chapter has a PSA charter and can be thought of as a local "branch" of the Society. The Chapter’s principle purpose is to further promote the aims, functions, and objectives of the PSA and to encourage membership in the PSA. Since 1955, forty Chapters have received a PSA charter. PSA-MET is one of the 11 Chapters in USA today. PSA-MET is serving for the PSA members in New Jersey, New York and Pennsylvania.