Yes, submission of abstract is permitted only after registration to the website.
There is no restriction on the number of abstract submissions by a person registered to the website.
At least one of the authors of an accepted abstract has to register to the conference as a participant, for presenting the work.
An author registered to the conference can present at most two works (poster/oral).
No, you cannot present a work without your authorship.
No, without registering for the symposium, you will not be allowed to request for accommodation.
Confirmation of accommodation request ensures your accommodation in one of the guest houses, but not alloting the type of room of your preference. The room allotment will be done subject to availability.
You may either directly contact the guest house at +913222 282834 or check for accommodation at nearby hotels.