Change 7.5.2 [expr.prim.this]/1 and /3:

1The keyword this names a pointer to the object for which a non-static an implicit object member function ([class.mfct.non-static]) is invoked or a non-static data member’s initializer ([class.mem]) is evaluated.

3It shall not appear within the declaration of either a static member function or an explicit object member function of the current class (although its type and value category are defined within a static such member functions as they are within a non-static an implicit object member function).