4.3.2 subject and exemption of indication.
(1) Subject
Material symbols shall be in principle indicated on all parts and materials made of/from plastic or rubber.
(2) Exemption of indication.
In case of part and materials made of/from plastic weighing under 100 grams and rubbers weighing under 200 grams. material symbols are not necessary to be displayed if anyone of the following condition are met:
(a) There is no space to indicate the material symbol may cause a functional failure
(b) The commercial value would be damage. if the material symbol would be displayed on the front surface of the part.
(c) Indication of he material symbol may cause a functional failure.
(d) Spacers. nonwoven fabric. stickers, etc. that are attached to the part.
(e) Parts composed of fabric only.
(f) Plastic parts welded or bonded to other parts.