I'm not entirely sure that is authentic
From casting notes I've read, the details hadn't quite settled that much by this point. For example, that memo lists the character of Tasha Yar. From what I read, the character was supposed to be Marsha Hernandez, it wasn't until Sirtis and Crosby's roles were switched (Sirtis was up for Hernandez, Crosby for Troi) that she became Tasha Yar to reconcile with Crosby's non-hispanic looks.