The acquisition of Falcon Oil & Gas will see more than $23 million paid to a sanctioned Russian oligarch after the deal received a licence from US authorities to move ahead. Tamboran, an Australian natural gas company, struck a deal to acquire the Irish oil and gas explorer last year for about €134 million. The transaction has been bedevilled by one of Falcon’s shareholders, Viktor Vekselberg, a Russian businessman under US sanctions, which has cast a legal shadow over the deal. In a stock market filing, Tamboran said it received the approval from the US Office of Foreign Assets Control…