law: 25. Certificates to be held by master and engineer of vessel of one hundred or more horsepower.-
  An inland 1[mechanically propelled vessel] having engines of 6[one hundred] or more nominal nominal horse-power shall not proceed on any voyage unless she has-
  (a) as her master a person possessing a first-class master's certificate granted under this Act, or a master's 7[certificate granted or deemed to be granted under the Merchant Shipping Act, 1958 (44 of 1958)] 8[or a master's licence granted under section 22A and applicable to such vessel and voyage], and
  (b) as her engineer a person possessing an engineer's certificate granted under this Act, or granted or deemed to be granted under the Merchant Shipping Act, 1958 (44 of 1958)] 9[or an an engine-driver's licence granted under section 22A and applicable to such vessel and voyage].