Follow the proposal format included in the RFP. For some proposals, that may entail filling out a form with specific questions.Materials may include site plans, tree inventory data, tree ordinance, staff and volunteer bios, and other documents relevant to the project. The Bidding Requirements consist of the Invitation to Bid, Instructions to Bidders,. As an example, in 2019,. Applicants must submit one electronic copy of the Application Form in PDF format. 2.2 Proposal submission. Proposals will be received in the Hennepin County supplier portal. The templates included in the appendices are sample forms and are not to be interpreted as offers. 5. Financial Stability; Trade Secret.