Hello everyone

I'm a McKenzie, and when it comes time to get my first kilt, I always thought it would be in MacKenzie Modern. Looking at the various versions of the clan tartan, though, got me to wondering what is the protocol, if any, for the wearing of Ancient vs Modern versions of tartans. Is there a guidline or general view? Does anyone care, or is it simply up to the wearer? Is the Ancient version considered more casual? I quite like the MacKenzie Ancient.

Thanks in advance!