<Tr> <Td> </Td> <Td> Italy </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> 7 </Td> </Tr> <Tr> <Td> </Td> <Td> United States </Td> <Td> 0 </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 5 </Td> <Td> Latvia </Td> <Td> 0 </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 6 </Td> <Td> Russia </Td> <Td> 0 </Td> <Td> </Td> <Td> 0 </Td> <Td> </Td> </Tr>

What is the main rule difference between paralympic luge versus olympic luge