<Tr> <Th> 16 </Th> <Td> Placed limits on the level of service required for a knight's fee . </Td> <Td> Y </Td> <Td> Repealed by Statute Law Revision Act 1948 . </Td> </Tr> <Tr> <Th> 17 </Th> <Td> Established a fixed law court rather than one which followed the movements of the King . </Td> <Td> Y </Td> <Td> Repealed by Civil Procedure Acts Repeal Act 1879 . </Td> </Tr> <Tr> <Th> 18 </Th> <Td> Defined the authority and frequency of county courts . </Td> <Td> Y </Td> <Td> Repealed by Civil Procedure Acts Repeal Act 1879 . </Td> </Tr> <Tr> <Th> 19 </Th> <Td> Determined how excess business of a county court should be dealt with . </Td> <Td> Y </Td> <Td> </Td> </Tr>

Who signed the magna carta and what did it do