Member states of NATO members and three former Yugoslav republics) from 12 March 1999 to 5 June 2017. NATO has added new members seven times since its founding in 1949, and since 2017 NATO has had 29 members. Twelve countries were part of the founding of NATO: Belgium, Canada, Denmark, France, Iceland, Italy, Luxembourg, the Netherlands, Norway, Portugal, the United Kingdom, and the United States. In 1952, Greece and Turkey became members of the Alliance, joined later by West Germany (in 1955) and Spain (in 1982). In 1990, with the reunification of Germany, NATO grew to include the former country of East Germany. Between
President of the Senate of Puerto Rico among [its] members." The Constitution, however, does not establish what a "President" is nor what its function should be. Internal rules adopted by the Senate through a simple resolution establish its definition, functions, responsibilities, and legal scope. Typically the president is responsible for the observance and compliance of the Senate's internal rules. He also typically: President of the Senate of Puerto Rico The President of the Senate of Puerto Rico () is the highest-ranking officer and the presiding officer of the Senate of Puerto Rico. The president has voting powers as it is elected amongst the own members of the