No vessel shall be repaired in any canal without the written permission of the canal officer. The repairs shall be made at the place and during the time named in the written permission, and at no other place or time. The owner of the vessel shall remove from the canal all surplus materials used for such repairs within fifteen days after the repairs are completed. In the event of his failure to do so such materials shall be removed by the canal officer at the expense of the owner of the vessel and the licence may be suspended until payment is made.
A vessel which has been enlarged or structurally altered in such a manner as to affect the conditions upon which the licence or certificate was obtained, shall not ply until it is remeasured arid a fresh licence or certificate is obtained. Such remeasurement and application for a fresh licence or certificate shall be made at the station at which the original licence or certificate was obtained. The applicant shall deliver up the old licence or certificate and shall, if the fee payable for the fresh licence is higher than that paid for the original licence, pay the difference between the fee paid for the original licence, and the fee payable for the fresh licence.