Found another one. In Minnesota, if the buyer does not have a valid driver's license, the vehicle cannot be put in his or her name. I think that since title is proof of ownership in most states, you may have trouble buying a car in states like Minnesota that require a driver's license in order to title a car.nd you can register it with just a state id card, and those cards don't give you driving privileges. Most insurance companies require the owner to have a valid driver's license before they will insure the car, so from a practical standpoint, you may need the license. Source: http://www.ncdot.org/dmv/vehicle_service...
The definition of compulsory is something that is required, not optional. An example of compulsory is a training course you have to attend. 1  that must be done, undergone, etc.; obligatory; required.  compelling; coercive.
So compulsory is a relative insistence. Mandatory is an overall rule which is like a law in itself. I'm sorry it's hard to answer. You can sometimes swap one word for another, but not in this case. The first sentence is detailing the age range, and mentioning service being compulsory. The second sentence is saying National Service is mandatory. National service is mandatory, if you're aged between 18-33 it's compulsory.