YES. I think, Excise and Taxation Office, Islamabad, has now been fully opened; for new registrations, transfer of ownership, Token Tax payment, etc. i.e. any / all sorts of public dealing, however, there is extreme extreme rush.
I reached there around 9:45 a.m. and till 1:30 p.m. (when my Himmat jawab dey gye, after continuously standing for about 3 hours and 45 minutes in different queues and always on the run), I was only able to only get the vehicle inspected from the inspector, get challan from the window No. 6, and submit dues in the NBP Br. inside.
Despite all the efforts, I could not get the relevant docs and current smart card submitted with the office, and also apply for computerized No. plates.