More good info from link at the bottom of home page. Many questions sorted by category.
https://housingconnect.nyc.gov/PublicWeb/faq
Also good (and official) on Income, available in text only and more than a dozen languages
https://www.nyc.gov/site/hpd/service...ome-guide.page
Fine to ask questions here but official published resources are very instructive and can be cited when discussing matters with agents and such like.
I am not aware of a more recent version of the Handbook.