Some more info for the general population.....(LINK)
Notify the Cruise Line When You Book
Let your travel agent or your cruise reservations agent know about your dietary needs as soon as you book your cruise. Norwegian requires notice 30 days before sailing. Advance notice allows the cruise line to fulfill your request. However, the earlier you inform your reservations or travel agent, the better.
Contact Accessible Travel
Norwegian Cruise Line has a special toll-free phone number for accessible travel. The number is 866-584-9756. In addition to notifying your reservation or travel agent of your special diet, it is also best to talk with an Access Coordinator. They can help ensure that your needs are met to the extent possible so that you have a wonderful cruising experience.
Talk to the Restaurant Manager
When you board the cruise ship, make sure that the restaurant manager or person in charge of onboard dining is aware of your dietary needs. Norwegian offers Freestyle Dining, which means that there are no fixed dining times or tables. You can dine where and when you want. Since you won’t likely have the same dining staff every night, talking to the dining manager will ensure that your dietary needs are taken care of — no matter where you choose to dine.
...but for Haven guests, the service will be more personal/direct.
In addition to sending an email to the the concierge deck ( NorwegianConciergeDesk@ncl.com ), you can also email the Access Desk. Being a Haven guest, the concierge desk SHOULD forward your requests to the appropriate people but you can do it yourself just to make sure.
DIETARY REQUIREMENTS
Special Medical, Allergy and Diabetes
Guests with special medical diets and/or food allergies should contact the Access Desk to discuss Norwegian Cruise Line's policies and procedures concerning special diets and your specific allergies prior to your cruise. Because the vessels are supplied all over the world, it may be easier to meet your specific food allergy requirements in some countries, but very difficult in others. Special dietary requests should be submitted at least 45 days prior to sailing. Any requests inside 45 days cannot be guaranteed. We can arrange to have no sugar and low sodium meals for guests with those specific medical dietary restrictions upon request. Refrigerators are available in many staterooms for storing insulin.
PLEASE NOTE: Kosher Dining is not handled through the Access Desk. Click here for more information.