Contractor is directed to review, fill out and execute the Public. Works Contractor Registration Certification attached hereto as Exhibit "E" prior to contract.Pursuant to Labor Code sections 1725.5 and 1771.1, all contractors and subcontractors that wish to bid on, be listed in a proposal, or enter into a contract to. Discover what a bid proposal is, the elements of a bid proposal, how to create one and a template and example that can guide you. Learn how to write a bid proposal for construction projects step-by-step. Elevate your bidding game and start winning projects more today.