41. While many aspects of national copyright laws have been standardized through international copyright agreements, copyright laws vary by country. 42. Ordinarily, international copyright violations involve foreign companies that simply steal a book and publish pirated copies without paying royalties. 43. There is " no " globally valid " International Copyright Law " that would take precedence over local laws. 44. The English text became a public domain work in the United States, and in 2006 the international copyright expired. 45. Stuart was an active campaigner for intellectual property rights and called for tighter laws on both national and international copyright . 46. Riley made a brief performance for the dignitaries at the event before speaking about the need for international copyright protections. 47. The Copyright Office promotes improved copyright protection for U . S . creative works abroad through its International Copyright Institute. 48. The new treaties " offer the most important overhaul of international copyright law in the last quarter century, " she said. 49. International copyright groups insist that special Source Identification codes be built into the equipment, so that every disc could be back-traced.50. The U . S . delegation is regarded a pivotal to the 160-nation negotiations for an update to international copyright treaties.
