N0m: Mishna Horayos 3:7 (13a in the Gemora), Rambam (on that Mishna), Shulchan Aruch, Yoreh Deah 252:8.
The Halacha most certainly does not “fade away”. The Titanic is a textbook case fitting perfectly into that Halacha. Obviously if goyim are running the show you’re not going to expect them to follow Halacha while we’re in golus. But Yidden most certainly must and will.