The Marine Navigation Act 2013 has potentially enabled ports contables in England & Wales to act as constables beyond this one mile limit, in relation to policing purposes connected with the port only, in a police area where consent has been obtained from the relevant Chief Constable. This act does not however give general police powers to ports constables beyond their core jurisdiction as set out in the 1847 act, merely in relation to policing purposes connected to the port as set out in the Act. As of 2014, 3 ports police forces (Dover, Teesport and Bristol) have sought and received consent from the local Chief Constable, with a fourth (Liverpool) in the process of applying for it. This has enabled these 3 ports forces to act as constables, in relation to policing purposes connected to the port, throughout the police area in which they are geographically located. There are 224 constables sworn in under the 1847 Act. Serious or major incidents or crime generally become the responsibility of the local territorial police force.