Assumptions section for the Terms of Reference (slide 13)
- Suitable resources from operations will be made available in a timely fashion during the Feasibility Study
- Stakeholders are committed to achieving the objectives and prepared to review and sign off work
- Stakeholders will be available to give guidance and inform the feasibility study
For easy reference and tracking purposes you'd want to give each assumption a reference number.
If there were any existing issues, you'd put an assumption here for each that they will be resolved. It's a good idea to give the timescale for resolution, after which the project will be impacted - even if only an informed guess.