Some of it depends on itinerary too. Lots of jeans and hiking boots in Alaska, which certainly complies with the dress code, but isn't particularly dressy. And brunch in the Caribbean should be more laid back. At the end of the day, you're right, the dress code should be enforced uniformly. I guess the condition of jeans can be a subjective call, and they should probably define dress shorts a little better. I'm thinking Bermuda shorts and golf shorts, but not cargo shorts or jorts. I would also consider draw string linen shorts acceptable (even if some people wouldn't) but then again, if you wear an untucked aloha shirt with them, who would know they had a drawstring? And if you tuck in your aloha shirt you should be arrested for crimes against humanity.