As used in this chapter, “clear legible type” means type which meets all the following qualifications:
(a) Is clear and legible.
(b) Is of a bright color which will be clearly visible against either a light or a dark background.
(c) Is printed by some method other than rubber stamp, such as by offset or letterpress, so as to prevent the ink from smearing and to insure that the printed matter will be clear and distinct.
(d) Is not less than the following size:
Total of length and width
of bag combined
Size of type
Less than 30 inches
10 point
30 inches or more, but less than 40 inches
14 point
40 inches or more, but less than 60 inches
18 point
60 inches or more
24 point