President Bush signed legislation Tuesday to punish Myanmar's brutal ruling regime by freezing assets of political and military leaders there and banning the importation of rubies and jade from that country into the U.S...[which] already is the voluntary policy of retailers such as Tiffany's and Bulgari... It also gives Chevron incentives to divest its natural gas program in Myanmar... [The US] Treasury Department announced financial sanctions on 10 companies suspected of being owned or controlled by Myanmar's government...including two big conglomerates — the Union of Myanmar Economic Holdings Limited and the Myanmar Economic Corp...