The United States has set "unprecendented" transparency requirements on its companies in Myanmar, a diplomat said Friday, days after a ban on investing in the country was lifted, according to dpa. US companies would be required to report on their activities "in line with the highest standards of international corporate governance," said US Ambassador to Myanmar Derek Mitchell. "In fact, this reporting requirement is unprecedented for anywhere else in the world our companies do business," Mitchell said. On July 11, Washington dropped its sanctions against US companies doing business in Myanmar, which have been in place for almost two decades. Observers have expressed concern about the risk of potential investors swarming to the country in recent months and fuelling corruption. -- SPA