Carnival Cruise Dress Attire Carnival Cruise Dining Attire?

Carnival Cruise Dining Attire? - carnival cruise dress attire

We're on a Carnival Cruise in a few weeks and I wonder about the bathroom.

My husband is not a dress up kind of person, and I wonder whether the informal dinner at night, you can wear jeans with a shirt button to be?

I do not see anywhere in the dress code prohibits this Carnvial where only T-shirts and shorts, even if I understood correctly, you should use a bathroom and a tie.

Will we be expelled if they jeans with a nice dress shirt and shoes?