What exactly was signed in Helsinki in August 1975?

Fifty years ago, the Helsinki Accords were an attempt to reduce tensions between the Soviet and Western blocs. But what exactly did 35 countries sign up to?

Fifty years ago, the signing of the Helsinki Accords was an attempt to reduce tensions between the Soviet and Western blocs by securing mutual recognition of the post–World War II status quo in Europe. But what exactly did 35 countries sign?