OpenRCT2 rules information
In the rules of FF% (OpenRCT2) there should be the "Enable early scenario completion" option added, because the speedrun of Deurklink1 (Aqua Park/White Water Park) had that option enable too (and it would make more sense).
I suppose I could mention the option, but ultimately since it doesn't impact the run I personally don't care whether it's enabled or not. I see no reason not to enable the setting for RCT1% runs either.
Whether you stop the run yourself when you reach the objective or let the game stop it for you shouldn't really matter.
Recent runs
Level: Thunder Rock
Level: Rainbow Valley
Level: Ivory Towers
Level: Lightning Peaks
Level: Big Pier