Diana, Your registrar is going to be held to the requirements from the IATF - they in turn will pass them to you. Any exceptions to the general IATF rules have to be documented and approved and are open to review by the IATF. Don't forget, that your registrar prepares a packet that they send to the IATF for review and approval before your ISO/TS cert is issued.
So, the correct document is the IATF Automotive Certification Scheme for ISO/TS 16949:2002, which requires first tallying the audit days by site & employees (Remember this is a re-cert audit, so the required days are already less than for your certification audit, for example for a site with 101 - 250 employees, 5 rather than 8,) than take the corporate reduction based on the number of sites - reduce to 80 % for 2 to 9 sites, 70 % for 10 to 19, and then 60 % for 20 and above. Looking at the first edition of the rules, I come up with 33 man-days, before the 80% reduction.
That's my opinion, but with the automotive requirements, I think you'll find very few registrars who want to stray to far from the numbers recommended by IATF documents.