A ship has finally departed from the loading port as soon as it has passed the limits of the poet being construed in the commercial sense, being ready in every respect to proceed on the contemplated voyage with no intention of returning. Consequently limits other than commercial limits, such as legal limits (established by port authorities) and fiscal limits, are not significant to the position of the ship for any particular reason, for example, for the payment of freight. In some charter parties freight by become due a fixed period of time after "final sailing".