The Obama administration has announced that it is eliminating a 100 US dollar limit on the value of Cuban rum and cigars that American travellers can bring back from the island. <br/><br/>The administration is also lifting limits on cargo ship travel between the US and Cuba and easing US and Cuban researchers' ability to conduct joint medical research. <br/><br/>The measures are contained in a new round of regulatory changes meant to ease US trade with Cuba. <br/><br/>The Obama administration has now made six sets of changes loosening the US trade embargo on Cuba in hopes that the normalisation of relations with the island will not be reversed by a future administration. <br/><br/>This round is expected to be the last before President Barack Obama leaves office.