Alongside the two straightforward cases where both clauses agree in form and function, there are six more patterns where they agree in being reports or directives in sense, although one or both outward forms differ.
Common functionThree possible form pairs
Report + report in senseDirective/directive, report/directive, directive/report
Directive + directive in senseReport/report, report/directive, directive/report
This yields 2 fully matched + 6 functionally matched = 8 conceptual patterns. Each still requires a suitable semantic relation for effective coordination.