Master Agreements (MA) are utilized when the County desires a list of pre-qualified vendors to perform various services, on an as-needed basis. This agreement allows parties to legally swap desired goods or services with a chosen vendor.It spells out the rights, duties, and expectations of each side. Final payment will bemade based on successful completion of the Contract and reports have been submitted to theCOMMISSION. The Vendor Self Service (VSS) Portal allows registered Vendors to manage account information, view financial transactions and respond to solicitations online. Exclusively in the County of Los Angeles. 8.22 Independent Contractor Status. 8.22. This video will outline the process of submitting a bid on the lavss website. In the event of a security breach of more than. Compensation insurance, Vendor must submit a written statement to that effect in a form satisfactory to Pace;.