Platform: any
ISP: any
Type of Internet Connection: any
Internet Connection Speed: any
Date & Time: December 29
Frequency: Always
Character Name: any
Race: any
World: asura
Main Job: any
Support Job: any
Area and Coordinates: any
Party or Solo: group
NPC Name: any
Monster Name: any
Steps:

Create a party with Master level players and someone at /49, level sync the party to say /50 and the trusts won't cure the /49 players at all. Trust won't recognize players in the party at /49 when synced to a master level setting. When you unsync, they recognize them and cure them again.