Your question was not only about your QMS, it's also about agreements with other organizations. While I must agree with our senior professionals on QMS/ISO interpretations, I wanted to add that an agreement may not be valid if the approver/signer is not duly authorized. No organization maintains QMS separately from other functions such as Legal or Regulatory Affairs. So, practically, which role (not person) is authorized/responsible for approving these agreements is usually clearly defined. At least it's true for all of my employers. I don't see "handcuff your wrists to your ankles". On the contrary, it helps to minimize possible unauthorized approvals and litigations.Thanks to all for the replies. It's been my approach to specifically draw out (assign and communicate) authorities and responsibilities, if not in a separate document, in a prominent section of the Quality Manual. My purpose is to build ownership among the other functional leaders (the QMS is not totally owned by the QM, essentially).
After further discussions, I find that there is a Product Services Specialist at our organization that reviews and signs, with input from other functions. I will include him on my Authorities/Responsibilities matrix-- pointing out that the role must coordinate with other functional leadership.