  In this paper, we revisit the null boundary gravitational charge in the
Newman-Penrose formalism with special emphasis on the charges from local
Lorentz transformations. We find that there is one more charge derived from the
local Lorentz transformation and the new charge is purely from the Holst term.
This reveals a remarkable fact that trivial terms which do not change classical
equations of motion can not only affect the boundary degrees of freedom through
their contributions to the boundary charges but also have their own rights to
create new boundary degrees of freedom.
