[sv-ec] 5.7 Array Assignment question

5.7 says, 
" A dynamic array or a one-dimensional fixed-size array can be assigned to a dynamic array of a compatible type."

Why only a 1-dimensional fixed-size array?

For example, why can't I write

typedef int a[1:10];
a dyn[] ;
int b[1:5][1:10] ;

dyn = b ;

Shalom Bresticker
Intel Jerusalem LAD DA
+972 2 589-6852