No.  The 14-character restriction comes from early Unix.

To be a bit pedantic in return, two sentences later, the guideline refers to "Exceptions: see the discussion of legacy names below."  At line 157: "Older versions of this package defined legacy names that are incompatible with the first rule of location names, but which are still supported."  This includes Canada/East-Saskatchewan.  Further, at line 135: "Do not change established names if they only marginally violate the above rules."