Which of the following is an acceptable form of ID for alcohol licensing purposes in New Zealand?

In New Zealand, an acceptable form of ID for alcohol licensing purposes must confirm a person's identity and age, which is a critical requirement for responsible alcohol service. A passport is widely recognized as a valid form of identification because it contains personal details, including the individual's date of birth and photograph, making it a reliable document for verifying age.

The other options do not meet the necessary criteria. A birth certificate, while it verifies date of birth, does not include a photo or other security features required for ID purposes in many situations, including those related to alcohol licensing. A national health card may not be widely accepted as it does not typically confirm identity or include a photo. A library card is primarily intended for borrowing books and is not considered a formal identification document with a date of birth or a photograph.

Therefore, the passport stands out as the correct answer because it fulfills both the identity verification requirement and the necessity to prove legal age for purchasing or consuming alcohol in New Zealand.