'Creates a new network ACL.
:type vpc_id: str
:param vpc_id: The VPC ID to associate this network ACL with.
:rtype: The newly created network ACL
:return: A :class:`boto.vpc.networkacl.NetworkAcl` object'

def create_network_acl(self, vpc_id):

    params = {'VpcId': vpc_id}
    return self.get_object('CreateNetworkAcl', params, NetworkAcl)
