There are already template submissions floating around for this bill. Please don't use them. As people who have worked inside the sausage factory have pointed out, form and template submissions are grouped and ignored. You will have more impact and be more effective if you write your own. It does not have to be long, just a few sentences: who you are, your top reason(s) why you oppose the bill, and a request to appear before the committee (if you want to do that - and remember, it can be done by phone or zoom). If someone else - a big NGO, say - says something you agree with, then saying "I support the submission of [X]" (optionally, "on [issue Y]") is good - but make sure to also say something in your own words. Don't just crib and rearrange their language, because it is very obvious, and then your submission goes in the template bucket.
[This BTW is why I stopped posting my submissions here: people were just copy-pasting them, which undermined my impact and theirs]
There are many, many critiques of this bill which you can mine for ammunition. The Waitangi Tribunal reports, politicians' first-reading speeches, Helmut Modlik, Ngati Toa, senior lawyers, Geoffrey Palmer, Chris Finlayson, even Jenny fucking Shipley. You can pick one problem, try and cover them all, or just go with the general vibe that this bill misrepresents our history and would be (in the words of the waitangi Tribunal) "worst, most comprehensive breach of the Treaty/te Tiriti in modern times". Just be polite, be brief, and above all, resist the temptation to tell the politicians what complete arsehats vandals they are for even considering this piece of shit law. (This is always the hardest bit for me. Submission voice is different from blog voice is different from Kikorangi voice...)
Rimmer will be looking for a big show of astroturfed support from Hobson's Pledge. It's our job to outnumber them, to bury them in opposition. The marchers showed that today with the hikoi (which is now being estimated at 40 or 50 thousand, with some estimates in the 80's); time to show it at select committee as well.