You are correct "Freezer" The P A web site states "all power driven vessels" must have Captains License.
Section 12 of the Harbours and Merchant Shipping Act is amended by Act No. 11 of 2007, to include Section 3 which states:
•Vessels involved in coastal and river service
•Scientific research vessels
•Private pleasure boats
•All vessels for hire
•All power driven vessels
The only exception is paddle dories or other similar craft