From a MK source.
"As of 10:20am, Magic Kingdom Park is currently at a Phase A status. We are currently not admitting Guests with Magic Kingdom One-Day tickets.
In addition we are not admitting Guests who have FastPass+ reservations for Magic Kingdom unless they have one of the following admissions.
Phase A status includes admission for the following:
- WDW Resort Guests*
- WDW Premier Passport, Annual & Premium Passholders
- Guests with Park Hopper tickets re-entering or crossing over from another WDW Theme Park
- Guests with Memory Maker
- Guests with dining reservations
- Magic Kingdom Guests with reservations for Bibbidi Bobbidi Boutique, Harmony Barber Shop or The Pirates League (if applicable)."
(*Guests from The Four Seasons Resort, Swan, Dolphin or Shades of Green are considered part of this group in this instance. In addition, Guests from Hotel Plaza Boulevard hotels arriving by bus are included (Best Western Lake Buena Vista Resort Hotel, The Buena Vista Palace, DoubleTree Suites by Hilton Hotel, B Resort, Wyndham Lake Buena Vista Resort, Hilton.) Also included are Golden Oak residents as well as registered Guests of Golden Oak residents.)