Using FTH services with a custom website

I want to revamp my club's website. I have found that Squarespace lets me build a professional-looking website on my own.
Q1) Are clubs allowed to have websites that are not made by/hosted on FTH?
Also, I cannot seem to link some features of my club's current website with Squarespace, such as the member login or the meeting agendas.
Q2) Is there any way to get these functions to work with a Squarespace website (or any other such tool)?

Our functionality cannot be divorced from and used separately from use of our total system.

There is nothing that prevents you from keeping your FTH website for club operations and creating a Squarespace website as a front end. However, you will not be able to mix functionality from the two. You could however just put links in the Squarespace website to pages and functions in the FTH website.

This will not absolve you from making sure you maintain TM standards for branding.... that is something we take care of for you in FTH.