The subcontractor's guide to working with Clark Construction, including their history, how to prequalify, payment tips, and more. The insurance carrier for the Subcontractor must have an A.M Best Rating of A- or better and the rating must be listed in the Certificate of Insurance.How do I fill this out? To fill out this document, first gather all required information such as your company details and insurance information. ARTICLE 15 – PAYMENTS: Payments shall be made as provided as described in the in the Progress Payment section of this Contract. With acceptance of deliverables, Clark agrees to make payment within 30 days of deliverables,. THE WORK: The Contractor shall complete all the work on the. To request a change of contractor, email the following: Change of Contractor Letter (See Sample Letters) from one of the following:. All trade contractors need to complete our Subcontractor Qualification Application to be eligible to bid on our projects and contract with Clark. In a form and with a carrier acceptable to Clark County.