4. The aircraft must be constructed from one sheet of paper only (using either a sheet of A4 or 81/2 inch x 11 inch quarto sized paper). The weight of paper must be no more than 100 gsm. The paper can be cut, but any piece of paper cut off cannot be rejoined. The use of standard light-duty clear cellulose adhesive tape of width 25 mm and total length 30 mm is permitted on any one aircraft. The tape may be cut up into smaller pieces but shall be used to hold down folds only
