Frozen Toilet Pipes

Questions about Moving Toilet Location

I am engaged in a major redesign/remodel of our second-floor master bath. The new layout calls for moving the existing toilet location about 12 feet horizontally from the present site. I plan to install a new Toto Guinevere 1.28GPF toilet.
I have a few questions:
1) What is the recommended/required drop per foot for a horizontal transit to the existing plumbing outlet site? (I have about 16" between floors.)
2) Does the existing venting need to be modified or moved to the new toilet location?
3) Other issues and/or recommendations?
Thanks in advance for any advice.

I am puzzled by what you question has to do with frozen pipes! The required minimum slope on a drain is 1/4" per foot, there is no maximum. The vent will need to be redone.

The vent within 6 feet. Should be 2"

But since you are in India, our codes do not apply to you.

Our plumbing codes may not apply, but the reason there are codes is they insure that the installation will work. We have all heard horror stories about plumbing in India and other 3rd world countries that do not have codes, but certainly if you desire to have a system that functions without problems, you would be wise in following our codes.