Since in p1971r0 where CA378 remove constrained non-template functions, the concrete rule is located in [dcl.decl.general] p4

The optional requires-clause ([temp.pre]) in an init-declarator or member-declarator shall be present only if the declarator declares a templated function ([dcl.fct]). When present after a declarator, the requires-clause is called the trailing requires-clause. The trailing requires-clause introduces the constraint-expression that results from interpreting its constraint-logical-or-expression as a constraint-expression.

However, it is just about requires-clause in an init-declarator or member-declarator. Whereas, function-definition is a distinct grammar that differs from them. How about the trailing requires-clause in a function-definition? Should it have had the same treatment with that in [dcl.decl.general] p4?