Very simple question... nothing to do with eligibility, my parent's nationality, length of stay, number of stars - nothing like that

It's a bog-standard non-permanent ID for a foreigner with a work visa.
Just... When I go along to apply for a card, which documents do I need to take with me? My UK passport with activated-on-Macau-trip visa, obviously, but what else? Offer letter from employer?
Can't see the answer anywhere on the Immigration Dept. website - I've emailed them but I've got no idea how long it might take to reply, and I'd guess there are a few people here who've done it...