Some Office of Sponsored Programs submission guidelines for agreements, for example in MyRA, indicate that an editable Word file of the contract is needed. This is requested by the Office of Sponsored Programs in order to facilitate processing of the submission, negotiating the terms, and obtaining signatures on the contract.
Even an agreement that has perfectly acceptable legal terms can, in many cases, require administrative adjustments that are difficult to make in a PDF. Some sponsors will not allow even administrative changes to be made by hand, and if they are, will reject such documents, thus necessitating a complete recirculation of the document for fresh signatures.
Therefore, it is extremely important to provide as part of your submission to the Office of Sponsored Programs editable Word files for review.