@vladthiengo
I direct you to page 4, paragraph 2, second line from the end:
“The official name of the board was initially the Board of Commissioners of Currency, Malaya, but it was popularly known as the Malayan Currency Board or Malayan Currency Commission”
As such, ‘Board of Commissioners of Currency’ would be the correct title for the Issuing entity, imo, as stated on the banknotes.
Incidentally, the banknote section here needs some serious development.
An interesting paper, btw, I have added it as a reference to one of the banknote pages.