Clause 5.1 introduces the classification of statement types. The structure shows that the clause classifies statements before the requirements in clauses 6 and 7 apply. A reader needs the classification because the family standard that applies, and the programme that produces the statement, depend on the type. The general subclause is the place where the division is introduced.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.