Entering MK Before Openi

What time can guests enter MK when the opening time is posted as 9am? In March this year, we were allowed to enter MK as early as 7:30am. Only Main Street was open, but guests could move as far as the castle and up to the ropes that stopped you from entering each land. Is this still in effect today?

That’s what seemed to be happening in June when we were there. Taps were open to all guests by 7:45 (perhaps earlier, but that’s when we arrived).