AN ACT TO AMEND SECTIONS TWENTY-ONE, TWENTY-TWO, TWENTY-THREE, TWENTY-FOUR, TWENTY-SEVEN, TWENTY-NINE, THIRTY, THIRTY-FOUR, FIFTY-THREE, FIFTY-FOUR, AND TO REPEAL SUBSECTION (u) OF SECTION EIGHTY-FOUR OF COMMONWEALTH ACT NUMBERED FOUR HUNDRED AND SIXTY-SIX, AS AMENDED