What are the correct colours for a personal danger tag, the purpose of 'Out of Service' tags, and who can use them?

Question 1:
The correct option for the colours used for a personal danger tag classification is:

a) red and black on a white background

Question 2:
The "Out of Service" tags are used to warn others of the following:

d) answer a, b & c are correct.
This means the equipment is defective, has a fault that could cause injury or damage, and/or repairs are incomplete.

Question 3:
The person who can place an "Out of Service" tag on faulty equipment is:

a) any person who finds a fault associated with a piece of equipment which creates an unsafe condition and needs repair