(Reuters) -A law allowing Russian airlines to register inside Russia planes leased from abroad came into force on Monday, creating a new obstacle for leasing firms and lenders seeking to repossess more than 500 jets before sanctions kick in. The bill, signed by Russian President Vladimir Putin, has rattled the global aviation industry as Western sanctions imposed after Russia’s invasion of Ukraine give leasing firms until March 28 to repossess aircraft worth $10 billion. Russian airlines have almost 780 leased jets, with 515 leased from abroad. The new law, part of Russia’s measures to combat …