Dolphins don't rape humans.
Raping a human requires the dolphin to be able to physically subdue a human and taking off the human's clothes the lack of opposable thumbs and hands really make it hard.
They can, however, "hump" a human and conduct in a way that if was made by another human being would constitute sexual harassment and molestation. Here are two ...
Yes, the Department of Environment & Forests of All States did issue a circular banning the establishment of dolphinariums. It contains the quote listed in the question. But, it's not correct that dolphins have been legally declared as "non-human persons". The circular only says that some scientists have suggested that they should be seen that way.
I found this in the International Journal of Aquatic Research and
The use of dolphins in rescuing humans has been instinctive, rather
than the result of formal training. Dolphins have rescued drowning
victims or abandoned survivors by allowing them to ride on their back
(Betancourt, 1998; Catton, 1990) or by psychologically encouraging
This seems embellished somewhat, there is an account of it on the Sea Shepherd site: "Years ago, while we were diving, a male dolphin guided my daughters Rossana and Patrizia, and myself, almost leading us by our hands, and gave us the chance to save a female dolphin who was tangled up in the meshes of a swordfish net. I maintain that his brain waves ...
No. The assembly is about a ban on trawling in Hong Kong.
From Hong Kong's trawling ban is big step to sustainable fishery
About 800 school children and teachers form the shape of a Chinese white dolphin, along with the word "Protect" and Chinese characters "Ocean" to complement the government's ban of trawling in Hong Kong from 2013. Photo: Reuters
Here is a link to a book about Dolphins The dolphin in history papers delivered by Ashley Montagu and John C. Lilly at a symposium at the Clark Library, 13 October 1962.
Published 1963 by William Andrews Clark Memorial Library, University of California in Los Angeles .
A portion of the text read,
Is there any evidence that dolphins save drowning ...