Any power of appointing new trustees vested in any persons within the Territory, jointly with any persons absent therefrom, and who shall have been continuously absent therefrom for at least one year then immediately preceding, may be exercised by such first-mentioned persons solely as if such power were exclusively vested in them, and such power shall extend to authorize the appointment of new trustees in the places of any trustees absent from the Territory, and having been continuously absent therefrom as aforesaid, and such trustees on any appointment of new trustees in their places shall cease to be trustees.