(Undated)  --  The Pac-12 is reportedly aiming to begin the football season on October 31st after previously deciding to postpone all fall sports until at least next year.  The conference athletic directors say Halloween is their preferred date and just need approval from the presidents and chancellors, who are meeting today.  Commissioner Larry Scott says he doesn't expect any decisions to be made today, but they will discuss a possible start.  The conference's biggest obstacles are California and Oregon's local health restrictions.