In addition to the power given to the land tax commissioners, general commissioners, and additional commissioners by subsection two of section twenty-six of the Taxes Management Act, 1880, to meet and act within such city, town, or place as therein mentioned, the said commissioners respectively may, with the consent of the Board of Inland Revenue, meet for the purpose of acting as such commissioners at any place outside the boundary of the division for which tifey act, and all things done by them, as commissioners acting for such division at that place, shall be as valid and effectual in law as if the same had been done at a place of meeting within the division.