That the title to all abandoned property, both real, personal and mixed, belonging to or held in trust for or by any religious organization known as the church of the United Brethren in Christ, or held for or by any religious society of any such religious organization, which property shall hereafter be determined by the Kansas annual conference of such church to be abandoned property, shall vest in and become the property of the trustees of said Kansas annual conference of said church: Provided, That this act shall not affect the reversionary interest of any person or persons, or corporation, now existing in any such property or any valid lien now existing thereon.