With the exception of the FSC (which was published in 2003), every charter gazetted in the last two years has used the DTI's COGP as their template. Most charters are a little scant on information and refer to the DTI's codes – others are just plain scant. The Construction Charter has included a clause that states that if there is any confusion between the charter and the DTI's codes then the charter is to prevail.
As a result it is almost impossible to implement any of the charters without referring to the DTI's codes. A working knowledge of the DTI's codes is absolutely vital, irrespective of the charter.