As per which rule of Post Office Guide Part 2 and other relevant rules, it is mandatory that all postal articles including ordinary articles containing goods meant for delivery to foreign destinations are affixed with correct and complete relevant custom declaration forms?

As per which rule of Post Office Guide Part 2 and other relevant rules

1.	As per which rule of Post Office Guide Part 2 and other relevant rules, it is mandatory that all postal articles including ordinary articles containing goods meant for delivery to foreign destinations are affixed with correct and complete relevant custom declaration forms?
A.	23
B.	31
C.	43
D.	47
E.	55
Answer» E. 55