Amending a by-Law in a meeting in which it is being considered

Hi

I am anticipating there may be some issues with a by-law that I am submitting for the renovation of a bathroom. It will be required to be passed as a special resolution as it involves water-proofing work.

It may be that I have to amend the scope of work at the meeting at which it is considered to have it passed. Is it possible to do this or is it an all or nothing approach to these types of motions?

Thanks in advance.