Sentence:  If your state has no provisions for the numbering of pleasure boats , you must apply for a number from the U. S. Coast Guard for any kind of boat with mechanical propulsion rated at more than 10 horsepower before it can be <WSD>used</WSD> on Federal waterways . 
Meaning of the word marked with <WSD> tags:  put into service; make work or employ for a particular purpose or for its inherent or natural purpose