(3) Principles of indication
(a) The indication shall be given at the place where it is easy to see and the commercial value of the part is not damaged so that the indication may be visible at the time of disassembly.
(b) In case the indication is given with ink or painting. etc., it is not allowed to have a negative effect such as a stain on other materials contacted with the relevant part.
C. The indication shall not disappear during the period of use of the product.
(d) In case the indication is formed by a mold or die. it is necessary to take care not to produce a stress concentration zone that may cause crack.
E. For an assembled part consisting of the various parts or multi-material components, the indication shall be in principle given on each component. however. it is acceptable to give the indication together at the place where the indication is easy to show.