31. Meanwhile, in 1882 the Universal Postal Union standardized on particular colors of stamps for international mail. 32. In 1994, South Africa was readmitted to the Universal Postal Union following the end of apartheid. 33. The Universal Postal Union adopted comprehensive rules for airmail at its 1929 Postal Union Congress in London. 34. Davis said British ministers had not made representations to the Universal Postal Union about the Argentinian stamps. 35. Upon joining the Universal Postal Union on 1 July 1875, Ottoman overseas rates conformed to UPU rules. 36. Most countries protect some areas, especially letter delivery, said Thomas Leavey, director of the Universal Postal Union . 37. Spain joined the Universal Postal Union in 1875, which was announced in the Philippines two years later. 38. Russian Post is a founding member of the Universal Postal Union ( UPU ) created in 1874. 39. .post-Universal Postal Union , a United Nations agency. 40. The Philippines eventually joined the Universal Postal Union , this time as a sovereign entity, on January 1, 1922.
