On the NCL home page click on LEARN MORE under the header for whatever promo NCL is advertising
when the page opens click where it says *View for full Terms and Conditions"
and you should see
https://www.ncl.com/about/terms-and-conditions/promotions
The CruiseNext offer is toward the bottom of the promo page. Below is copy and paste of the current offer. This is very common offer - we prefer offers that don't require booking a balcony or above to use two credits.
CRUISENEXT DOUBLEUP! OFFER
Booking Window: May 9th – May 13th, 2024 11:59 PM EST
Offer Details: Book a Balcony or above stateroom on any sailing booked at least 4 months in advance and apply TWO CruiseNext, CruiseNext Haven, CruiseNext Lite credits*