CMS also is an
acronym for the
Convention on Migratory Species.
The headquarters is located at:
UNEP / CMS Secretariat
Martin-Luther-King-Str. 8
D-53175 Bonn, Germany
http://www.wcmc.org.uk/cms/
From their introduction page:
The Convention on the Conservation of Migratory Species of Wild Animals (also known as CMS or the Bonn Convention) aims to conserve terrestrial, marine and avian migratory species throughout their range. It is one of a small number of intergovernmental treaties concerned with the conservation of wildlife and wildlife habitats on a global scale.
I heard of CMS during some marine biology studies I was involved in concerning marine turtles.