question on editing a spec

Hi,
We understand that the final spec that is approved needs to be in html. Is 
it there any problem if  interim versions are in other formats (eg pdf)? 
Also, is it required that interim versions of the spec need to be made 
publically viewable (or is that optional)? 
Thanks. 
Regards, Diane
IBM  Dynamic e-business Technologies

(919)254-7221 or 8-444-7221, Mobile: 919-624-5123