It is safe to say that in any profession, once you have a license, it would become much easier for you to get or land a good job, right? Having a license for your profession means that you have undergone the needed educational training, you have also undergone the extensive training and also most importantly, you passed the NASCLA exams that were made just for your profession. The contractor exams are one of these exams. As a person studying and learning about being a contractor, no matter how good you are, you must have a license so that you will be able to work for the biggest companies in the contracting industry. You will have to get a contractor license for that but before you get that license, you will have to pass the contractor exams. There are states that will have different requirements for each contractor, some states or countries will not allow you to work as a contractor unless you have the license but some states will allow that, it will depend on the laws and regulations of each state since each state or country has different set of rules.
If you have a license on another state, that will not necessarily mean that you can work as a contractor in any state that you want, you really have to take the contractor exams before you can legally work in that place. A lot countries will require you to have a contractor license since it is an assurance on their part that you are indeed knowledgeable in the craft since you can only get that license when you pass the SC Residential Builders exams. That is why if you are planning to become a legitimate contractor, you really have to prove that you are indeed a contractor exam passer. If you are able to pass the exams, you will have a lot of opportunities as a credible and licensed contractor and you will not regret the hardship that you have undergone just to get that licensure.
But there are similar rules and laws shared by all countries and states, example is you have to of legal age to work and that is at least eighteen years old, another similar rule that is being shared by all countries or states is that you have to have a high school diploma or something that will have equal of value. These rules are shared since it is a common trait for people to be able to work with that in mind since that is quite a common and simple requirement, right?
Check out http://en.wikipedia.org/wiki/General_contractor to read more about this.