Simplify the following text for a Grade 12 native English-speaking person.
Original: The remaining 0 â `` 15 % can comprise any non aromatic black grape varieties included in a list made and periodically updated by the Regione Toscana ( Tuscany ) local authorities .
Simplified: The remaining 0 â `` 15 % of any non aromatic black grape varieties included in a list made and periodically updated by the local authorities .