The schedule shift marks a drastic change from tradition.
All out of conference games have been canceled this season.
"As we go into this adventure, this is an aspirational schedule, we recognize that", Harlan said.
Asked if he believed a college football season will happen, Scott said: "I don't know". Those sports have permission to begin practice on August 15 and would also begin competition no earlier than the weekend of September 26. Among them, what if all 12 programs are unable to begin training camp on time beginning August 17?
California and Arizona have been among the hardest hit by a surge in COVID-19 cases over the last month.
Pac-12 football programs will be allowed Monday to begin 20 hours per week of mandatory team activities, which include strength and conditioning, meetings, and non-contact walk-throughs.
With Aug. 17 as the common starting point, teams will have 40 days before the season begins.
"Everybody can start as early as August 17 but it's not my expectation that everyone will start or manage their 25 (practices) the same way", Scott said. "Everyone can start as early as August 17, but it's not my expectation that everyone will start or manage their 25 the same way". The Cougars, who are not members of any conference, will be forced to drop scheduled games against Utah, Michigan State, Arizona State, Minnesota, Missouri and Stanford.
The new 10-game schedule: vs. Utah (Sept. 26), vs. Oregon (Oct. 3), at UCLA (Oct. 10), vs. California (Oct. 17), Bye (Oct. 24), at Stanford (Oct. 30), at USC (Nov. 7), vs. Arizona State (Nov. 14), at Oregon State (Nov. 21), vs. Washington (Nov. 27), at Colorado (Dec. 5). Early indications out of USC and UCLA are that they will opt for more time, so that season opener appears a safe bet to move to October 31.
The 2020 Pac-12 Football Championship Game has been pushed back two weeks and will now be played on Friday, December 18 or Saturday, December 19 at a campus site.
"We've got two opportunities for each team to potentially reschedule", Scott said. "We realize there are some markets that don't have the requisite approvals at the moment to start on time".