The Lindsey Graham Act signed into law last month gave Donald Trump the authority to impose duties up to 100% on major buyers of Russian oil and gas. (EPA Images pic)ASHINGTON: President Donald Trump signed an executive order Friday that waived sweeping US sanctions and tariffs targeting Russia's energy revenues after signing them into law last month.

The Lindsey Graham Act -- named after the deceased US senator who sponsored the bill -- allowed Trump the authority to impose duties up to 100% on major buyers of Russian oil and gas.

"As described further in section 4 of this order, I am hereby waiving the application of such sanctions, restrictions, and duties provided for in the Graham Act," the executive order said.