How to bid on a Services, Supplies, and Equipment contract. File a contracting disclosure form.Most contract opportunities are posted on Contracts Hub. 02 - Construction Bid Proposal. "Proposal" means a Bidder's price and other specific terms and conditions included in a Bid. ll. Threshold requirements provide a baseline for all proposals, which means they provide basic information that all General Contractors must meet. A. The Instructions to Bidders document is attached following this page. The Authority seeks to procure snow removal services for parking facilities at Philadelphia International Airport ("PHL") under a three (3) year contract.