Both are correct. The rule says the letters “IB” must be shown following the Packing Instruction number. The rule is written to fit both the manual form and the computer produced form. Some of the computer programmed forms are unable to print the letters “IB” in the Packing Instruction column and therefore flexibility is allowed to accommodate such cases. As stated in 188.8.131.52 (b), the information must be entered in sequence and should be within the columns provided. There is flexibility with the use of the columns. The letters “IB” must be written following the Packing Instruction number but could be in the next column if space or programming does not permit.