What is the scope of the Chilean Official Standard NCh772/1.Of92?

I- The standard establishes the minimum requirements that safety footwear must meet for general use.
II- The standard applies only to safety footwear of Chilean origin.
III- The standard was modified in 1993, specifically in the chapter on Marking.
a) Only I is correct.
b) Only II is correct.
c) Only III is correct.
d) I and III are correct.
e) All statements are correct.